From the reveal trailer, not only does B.J live in this Sequel, but he's going to be a father with his Love Interest Anya, who announces twins are on the way. Provided he survives The New Colossus, he'll potentially be able to see his children in a world free from Nazis.
It also gives B.J. far more incentive to defeat the Nazi regime aside from it being his mission since World War II and as part of La Résistance: as he explicitly states in the trailer, he won't have his children be born into a world where they will be oppressed. Developer MachineGames continues to give B.J. more nuance, like they did previously in Wolfenstein: The New Order.
B.J. defending Sigrun after Grace is hostile to her, and claim she is 'good people'. That is a lot from a man who almost pathologically hates Nazis to the point of impulsively attacking Kreutz for wearing a swastika tattoo, and Sigrun being the daughter of his worst (surviving) enemy.
Based on how his father treated him and his mother, he probably sees a lot of himself in her. He knows what she's been through and wants to help her.
One of the side activities you can do on Eva's Hammer is sit with Sigrun for a while in the cafeteria, right after some of the Manhattan Hacker collective move tables to get away from her. If you do this, they'll ask Sigrun how she's on speaking terms with Terror-Billy, and then after hearing it was her that saved his life they immediately invite her over to their table to play a game with them.
In Roswell, there is a newspaper salesman who seems to recognise B.J. as "Terror Billy" and tells him that if B.J. is who he thinks he is, he wholeheartedly supports him.
B.J.'s mother giving him an engagement ring that has been in her family for generations and telling him to save it for someone special was a very sweet scene. So was seeing her stand up to her abusive husband so he wouldn't hurt young B.J., even if it ended with herself getting hurt. It's good to know B.J. at least had one caring parent.
Even after all the shit Frau Engel put her through, Sigrun still refuses to directly partake in killing her own mother. And making things even sweeter, it's Grace who comforts her and tells her it's okay to stay behind.
Sigrun: Can I stay here? I just can't be a part of what must be done.
Grace: It's okay, Sig. *Pats her on the shoulder* You earned your keep.
The resistance members on Eva's Hammer come from a variety of diverse backgrounds, but they all get along regardless of race, nationality, or mental health issues. Their community's very existence is one huge middle finger to Nazi ideology.
Brief as it is, the short scene of Super Spesh playing with Grace's daughter Abby. In the midst of the bleakness and the violence of the game, it's a surprisingly warm and human scene. It just gets better with hindsight when you progress deeper into the game and learn that Super Spesh and Grace are lovers, and Abby is their love-child.
Somewhere between this trope and Tear Jerker is Grace's thanks if you find Spesh's final letter to her in the post-game Roswell city assassination sidequest.
BJ visiting his family home is mostly a tearjerker, especially when it involves Rip Blazkowicz. However, the man did do one thing right - when Billy was suffering from night terrors, dreaming of monsters coming to kill his mother, Rip hands him a BB gun and goes down to the basement to hunt them down, allowing Billy to rest easy.
Of particular note was his bringing her into the barn to watch a rat drown in a mop bucket. He's downright gleeful about it, as the rats have been eating their grain and pooping in their cupboards, but Billie is horrified and begs him to help it. Just as the rat starts to sink, B.J. kicks the bucket over, with the rat starting to breathe after a bit of a delay. On that day, Billie taught B.J. that Good Feels Good, and likely tore him completely away from his father's toxic influence.
And the reason BJ went home to begin with - to fetch the ring that his mother had given him so he could give it to Anya.
Right after the resistance give their live broadcast, B.J. retrieves his mother's ring off of Engel's corpse, and uses it to propose to Anya, who seemingly acceptsnote the camera cuts out right before we get confirmation.
"Show Anya you're okay".
The entire birthday party scene. In all the horror that goes on, it's great to see everyone kick loose and just enjoy life.
Of particular note, of course, is Anya, who wouldn't let anything, even Death itself, keep her and BJ apart.
Set: She is relentless, this girl. She's a keeper.
A small one with Max, who immediately runs up to BJ when he sees the latter up and well. Considering the amount of people the poor guy has befriended and lost within the past year, it's really heartwarming to see him so happy.
Throughout the game, Max can be seen coloring on slats of wood. Near the end, they're shown as part of a wall mural of Klaus.
In life, Klaus had a swastika tattoo, which he kept as a Mark of Shame and intended to have removed once the Nazis were defeated. He didn't live to see his work completed, but his picture in the mural has no tattoo. Apparently, Max knew how his adoptive father would want to be remembered.
If you look closely at the cover art, amid the burned-out wreckage of Manhattan and the Nazi banners (even if they do just sport the W logo, you can still clearly tell what they are supposed to be), you can see an American flag. It's tattered, sure, but it's an American flag, and it's still flying. Even with Manhattan nuked and symbols of evil everywhere, the spirit of America lives on, and with BJ and company igniting a second American Revolution, it's set to return with a vengeance.
BJ comforting Wyatt following his bad trip and attempted suicide. Not only is seeing Wyatt back on something of an even keel good to see, BJ caps the scene with some quiet but plainly heartfelt words.
In the previous installment, Max was more or less just there, occasionally doing menial tasks at the behest of Klaus but otherwise preferred to keep to himself. In this game. Max is a much more active member of the resistance, even going on field missions. He took his adoptive father's words to heart, and saw the strength in himself to help others.
When BJ gets out of the Roswell underground, he holds up a Nazi soldier, takes his keys and gun and then instead of killing him like you might expect, just tells him to run. While he might have just done it because he knew the man was going to die in the bomb blast, it's nice to think that as much as BJ hates the Nazis, he still won't stoop to their level and murder an unarmed soldier.
. He's downright gleeful about it, as the rats have been eating their grain and pooping in their cupboards, but Billie is horrified and begs him to help it. Just as the rat starts to sink, B.J. kicks the bucket over, with the rat starting to breathe after a bit of a delay. On that day, Billie taught B.J. that Good Feels Good, and likely tore him completely away from his father's toxic influence.