TheSilentShane

That's without his massive fin, which is likely going to be CGI judging by the actor's head fixture. Seeing as how the minifig in question doesn't seem to have a hairpiece and is purple with blue skin, my bet is the mystery fig is, in fact, Nebula:

I didn't list them in any particular order, just in order of which popped into my head first. I'd really like to see Clayface and Ra's most of all. But Killer Moth is awesome, regardless. He's been a long-running Batman villain and has a rather large cult following. Edit: OH SNAP. I'm loving the look of the GotG set, even if it is a small picture. Looks like it will be a three-minifig set with Starlord, Gamora, and Nebula/Yondu/Collector.

I don't mind the abundance of Batman sets, even though, as a DC fan, I would definitely like some non-Batman sets. My main issue with the Batman sets, however, is the fact that they keep rehashing the same villains again and again and again. I mean, we got four Batman sets in this wave and only one new villain (a villain which was quite easy to make with existing Lego pieces from the Monster sets). Where's a new Killer Croc? Hush? Killer Moth? Black Mask? Clayface? Deadshot? Deathstroke? Victor Zsasz? Mad Hatter? Firefly? KGBeast? Ra's Al Ghul? Anarky? Talia Al Ghul? Red Hood? Hugo Strange? Talon (since they seem to be going with the New 52)? I'll take Batman sets, even though I want other DC characters, but by all that is holy stop giving me new versions of the same villains in place of ones you haven't made yet!

I doubt they'll forgo another minifig for the brick-built Sentinel. I have a feeling it will be akin to Doctor Doom's chopper from the Daily Bugle set or the jeep from the Battle for Smallville Set.