Supposedly there is a very EDM-ish song on there, that's probably the one Skrillex worked on?
Honestly if you ask me Skrillex probably just got some synths on there or his track got dropped.
Definitely not. Jay is too busy doing his Roc Nation Sports shit, and I'm pretty sure Kanye doesn't care for having Jay on there at all. Doesn't really need him on any track, but if he does he knows it's a call away.
I think this album is sorta what WTT was supposed to be before Jay demanded it be all pop-y and digestable. What we're hearing about Yeezus is similar to what we heard of early WTT. "Black" music, with a focus on black history and political undertones. Maybe a song from the first version of WTT will end up on the album, but I doubt it.