Much has been said about Teen Titans' status in DCAU continuity. Here's my take on it:
If we are to assume that Teen Titans is in fact in continuity, then...
Robin in Teen Titans must be Dick Grayson (and not Tim), for these reasons:
- He is too old to be Tim, since we see that Tim looks to still be 13-14 in RotJ, and he doesn't have anywhere near the level of Kung-Fu prowess and wisdom displayed by Robin in TT.
- The alternate universe version of Robin seen in "Fractured," while nicknamed Larry, is actually named "Nosyarg Kcid," which is "Dick Grayson" backwards. There's one instance where his name spins around his body, and when it goes around the back, we can clearly see the name "Dick Grayson."
- Robin's entire character in the Teen Titans show mirrors the comics' version of Dick, right down to his romance with Starfire and the revelation that he will eventually become Nightwing.
This doesn't quite gel. In Teen Titans, Robin is shown to be essentially a mini-Batman, having a neverending drive for victory, unparalleled detective skills, and martial arts mastery. However, in BTAS, Dick has none of these skills. It is true, however, that we get a glimpse of Robin's driven personality from Teen Titans in "Robin's Reckoning," but we also get a strong sense of naivete and immaturity, something that wouldn't seem to make sense with a character than has fought interplanetary/galactic/dimensional threats, let alone actually made out with an alien girl.
There is also an inherent problem with the idea of the science fiction elements of Teen Titans.
In Superman: The Animated Series, Lois Lane is at first somewhat unbelieving of Superman's alien nature, which would seem odd if aliens had visited Earth many times before (as they did in the 2nd episode of TT). Furthermore, Superman and the rest of the world know nothing of the Atlanteans until "Fish Story," yet Aqualad had countless team-ups with the Titans. And let's not even mention how the Titans have a spacefaring submarine, yet most of the television sets in BTAS are black-and-white.
I'm not saying that Teen Titans shouldn't be watched (because I LOVE that show), but I don't think that you can realistically put it in the same continuity as BTAS, STAS, BB, and JLU. Considering how easily those other shows mix together, Teen Titans sticks out like a bleeding, crushed, broken, and rotting thumb.
My ultimate view is that the Titans probably existed in some form in the DCAU, but their adventures did not happen as portrayed in the Teen Titans series.
Still, though, Teen Titans is awesome, and I plan on reviewing every episode.