WDWNT says Hulk and Doom will both close by the end of the year. Hulk's rumored work I assume would talk 1/2 a year? Maybe more? I dunno. I'm not an expert on stuff like that.
If Doom is really closing and is really being demolished for a new ride, I'd guess we have until 2018 for that? Big IF's there.
It really is. One thing I will say, it will STILL BE MARVEL. I feel dumb for having to put that in caps, but it needs to be hammered home for some.