Aborted Arc in this franchise.
Comic Books
Teen Titans
- Mal Duncan abandoned his Hornblower identity and went back to being the Guardian after the Gabriel Horn was stolen, and the plot was never resolved. Had the book continued, it would have been revealed that Mal had hidden it himself because he subconsciously did not want to be a superhero anymore.
- There had been some broad hints in Geoff Johns' run prior to Infinite Crisis that the new Aquagirl would be joining the team, with her expressing an interest in the Titans and showing up as Aquawoman in Titans Tomorrow. Plans changed at some point, so she ended up joining and quitting offscreen during the "One Year Later" Time Skip. She finally joined the Titans for real during Sean McKeever's run, long after Johns had left the book.
- Likewise, the Son of Vulcan mini-series ended with the title character going to San Francisco and introducing himself to Beast Boy. This was obviously supposed to set up a plot about Vulcan becoming a member of the Teen Titans, but this never happened.
- The "Origins & Omens" back-up story foreshadowed a number of events which were supposed to affect the team, such as Static joining, Kid Flash returning to life and rejoining the team, Kid Devil dying (in a completely different manner than the way he actually ended up dying), Blue Beetle hooking up with Wonder Girl, and Sun Girl becoming pregnant with Inertia's baby. Aside from Static becoming a Titan, all of these were ignored when writer Sean McKeever was fired.
- McKeever had notably planned to resurrect Kid Devil and restore his powers. After Blackest Night temporarily established that "dead means dead" in The DCU, this plot was dropped as well.
- McKeever's run also revealed that Bombshell's mother was Evil All Along and the true mastermind behind Project Quantum. The change in writers derailed this subplot, and Bombshell ended up being booted off the team before it could be resolved.
- The same thing happened to JT Krul during his run. His first issue showed glimpses into the future which revealed that Aqualad from Young Justice (2010) would be joining, and that the Teen Titans would end up involved in a crossover with Deathstroke's team of Anti-Hero Titans. Flashpoint rendered all of this moot.
- Felicia D. Henderson's final two arcs were basically an extended Backdoor Pilot for a new Static Shock ongoing. The new series was supposed to have been based around the hook of Virgil trying to get his powers back, but the book ended up being delayed and eventually canceled entirely due to the New 52 Continuity Reboot. A new Static Shock book did launch with the New 52, but it had a different creative team and was completely unrelated to Henderson's proposed series.
- Years prior to this, there was the ill-fated Titans L.A. spin-off that was planned. The group was first hinted at in the Beast Boy mini-series, the seeds were planted in a Titans Annual, and the team finally assembled in the Titans Secret Files one-shot only to...never appear again. Cyborg later confirmed that the team had disbanded with a Hand Wave line of dialogue.
- There was also the revelation that Terra II was apparently the real Terra all along. Terra II fell into obscurity before this could go anywhere, and ended up being killed off the next time she made a significant appearance. The whole reveal was later retconned itself, as it turned out Terra II was indeed an impostor, albeit one with Identity Amnesia. Although, this explanation in turn is similar to Marv Wolfman's original intent for the character, before the later New Titans editor (Pat Garrahy) had mandated a story to imply the two Terras were the same (which Geoff Johns and Ben Raab intended to expand upon with their reveal).
- At one point, Deathstroke was shown taking in Poprocket, a homeless teen metahuman. It was stated that he had plans for the girl, but she soon disappeared without explanation. Presumably, they were setting up Poprocket to be part of Deathstroke's Anti-Hero team of Titans, but for whatever reason she ended up not appearing in that book.
- During the second New 52 series, a Durlan girl was introduced to the team and went by Chameleon. Aside from being a big Legion of Super-Heroes reference (Durlans are prominent in that series, and one of their members goes by Chameleon Boy, and sometimes just Chameleon), she was basically the new version of Miss Martian. Once Scott Lobdell came back on as writer, she was shuffled off and never mentioned again.
- In The Lazarus Contract, Wally West was fitted with a pacemaker after some time-travel hijinks. The pacemaker meant that the more that Wally used his speed, the more he would risk his health, and going too fast would basically kill him. Writer Dan Abnett said he had a grand story about defining Wally's role in a world where a Flash and Kid Flash already existed. Wally even wrote a letter to Dick, resigning from the team. But this went to nowhere, as his heart issues were wrapped up quickly in the arc right after The Lazarus Contract, when Kid Flash healed his heart. And after that arc, Wally's story was moved to the main Flash comic where Joshua Williamson set up his new status quo.
- When Wally returns from the Speed Force in DC Rebirth, he's established as having had a relationship with Lilith Clay in the new continuity. In the Rebirth special of Titans, the first thing Omen remembers about Wally is a kiss they shared and she acts fond of Wally during the entirety of the first arc, showing hints of lingering crush on him and some jealousy towards Linda Park, his pre-Flashpoint wife who she says is all he can think of. This plotline is dropped after The Lazarus Contract once Lilith and Garth enter into a relationship without even mentioning her past with Wally.
Titans (1999)
- The first Secret Files issue mentioned Supergirl (at the time the Earth-Angel combo of Mae Kent and Linda Danvers) as one of the Titans' allies, with Supergirl even promising Roy she'd check in with the team when she had the time. Nothing came of this.
- After Dark Angel erased the memory of Donna from everyone in the world, Donna was shocked that new hero Epsilon somehow knew who she was (but then later pretended he didn't know her). This plot point was never followed up since the Epsilon story arc got heavily rewritten thanks to extensive Executive Meddling mentioned by Word of God.
- It seemed as though Arsenal and Dakota Jamison were slowly hitting things off despite their rocky first meeting, but much like the Epsilon arc this got derailed thanks to the DEOrphans.
