i suspect we might finally see some kind of trailer or announcement of what titan is either at some of this years gaming conventions of blizzcon. that being said about the only way ill end up playing it is if it goes the gw2 or d3 route and is a b2p type game. im no longer interested in buying a game and then continuing to pay for it. call me a cheapskate or a dick or whatever you will but i just dont feel like the normal $15 a month is worth it in just about any game. just my .02
edit : that being said, a fully fledged starcraft mmo could be the exception to the $15 a month rule. i would most likely at the very least buy the game and try it out for a month. anything diablo related i wouldnt be interested in. i feel like that whole story has run its course 1 too many times. that and i was massively disappointed with how terrible the story was in d3