Okay, first of all as Krab keeps mentioning the Titans don't actually exist yet, so you'll need to remove all mention of them from your signup.

Second... You seem to be implying he'd be a part of the Titans when everything points to him being a straight-up villain.  Maybe it's because I'm not a fan of Punisher-esque murderous "heroes", but... That's what he comes off as to me.  Suffice to say, the Teen Titans are [i]not[/i] going to let a guy who keeps trying to kill people stick around, and would most likely hand him over to either the authorities or psychiatric help as soon as possible.  Speaking of the "Teen" part... Isn't he a bit old?

Power-wise... His "keen eye" seems more like x-ray vision so I'm not sure why you didn't just call it that, but that's just nitpicky.  As for Rage... What do you mean by "drain energy"?  That's a bit too vague, and will need a little elaborating.

Also, his personality is a bit too barebones for my liking.  And "he has an extreme dark side" always rings warning bells for me, so... A bit of elaboration, even if I can gather a few things from the bio.  And the "suit" picture only shows his head, so it gives absolutely no idea of what his suit actually looks like.

Finally, um... Is there any reason why the whole bio is in bolded blue?  Is that some weird stylistic choice I just don't get?  I'll admit this one is [i]really[/i] nitpicky but it just seems a bit... Weird to me. ^^;