The fight against Ranger takes place in a map which has Rocket Launcher, Shotgun and Plasma Gun, plus an armor and medium/large health items. All of the weapons appeared in Quake: the Shotgun is the default ranged weapon and the Rocket Launcher is iconic. As for the Plasma Gun, it appears in Dissolution of Eternity as a modified Thunderbolt, or if you'd like, in the guise of the Super Nailgun in the base game; the SNG is essentially a Plasma Gun that shoots nails instead.
The battle takes place in what looks like a cathedral being taken over by hell, and there's also the map's name ("Arena Gate"), considering that Quake is basically the first game in the series and (slip)gates are a common happenstance. Not to mention, Ranger is the very first opponent you face. How fitting.
The fight against Phobos takes place in a map which only has the Rocket Launcher, Plasma Gun and Shotgun, plus armor and health items. All of the weapons and items are present in Doom as well. The only odd out is the Haste power-up.
The map the battle takes place in has the Icon of Sin from Doom 2 as a wall decoration, and it being the second map may also be a reference to Doom being the second FPS game created by Id after Wolfenstein 3-D.
The Vadrigar placed Mynx (a hottie whose description says that she is a former porno star) and Orbb (a camera turned robot warrior) in a battle inside a tier which is otherwise comprised of 1on1 battles. Those dirty aliens...
Bitterman doesn't look the tiniest bit like the other two male characters which come from II (Grunt and Stripe) and are inspired in the multiplayer models. That's because in IIwe never see his entire body and he isn't a selectable player in II either so we're seeing him in his actual form.
Major, another character from the Stroggos arc has appeared in the game. The only thing is that she underwent a Gender Flip situation, as in II she was made a male selectable model.
It might seem odd that the Quad Damage only triples damage by default in this game. While this was done for balance sake, this is also the third Quake game so it fits the theme.
