Tim's new identity might be a joke.....


Bendis: "confirmed! #youngjustice 7. new design by @johntimmsart new Tim Drake alias 'conceived' by Bart Allen. #hmmm"


It seriously might just be that the team's on a different world and they need to go undercover to blend in, so they have disguise, and Bart makes a running joke about Tim's look by giving him a new name.

I wouldn't count this possibility out yet. Solicits are known to be cheeky as many have reminded me.