alright i found that article where eckhart talks about twoface being in a coma, it still seems like he's saying he's dead though. Still its a little bit to go "oooo" over.
https://movies.ign.com/articles/943/943928p1.html
Harvey Dent in a Coma?
Eckhart Two-Faced about future of character.
by Orlando Parfitt, IGN UK
UK, January 12, 2009 - Remember a few months ago, when Aaron Eckhart was telling all and sundry that Harvey Dent/Two-Face, the villain he so memorably played in The Dark Knight, was definitely dead?
Well, he seems to have maybe changed his mind, having said the following to MTV News at the Golden Globes on Sunday: "I think Harvey -- if he's not dead -- is in a serious coma and I'm not sure he's coming out. They might pull the plug on him."
Whilst he still doesn't sound too optimistic about reprising his role as the villain in Nolan's second Batman sequel, the fact that Eckhart is now saying his character is alive is certainly more ambiguous than what he was saying back in September, when he told Coming Soon: "He is dead as a door nail. ... He ain't coming back baby."
The fact that he reckons his character may well be alive will give hope to Bat-fans eager to see Two-Face in Batman 3.