I'd figure Platinum to be among the least likely. They more or less have made themselves a Ninty 2nd party.

Agreed on other points though

Platinum or Dragon Dogma would be my two likely guesses.

As for anyone suggesting Fallout4/ME.. that would cost MS a couple hundred million easy (300m)... don't see it myself. Especially now PS4 is selling so well. This is one of those deals where if you are a struggling company you don't care what platform it comes on, that would make Plat or Capcom the two likely candidates.

Edit: Rainbow Six would also apply if as someone else mentioned has had troubled dev... easier for MS to come and scoop it up when a game has struggled to do well.

Probably the Prince of Persian reboot. I doubt MS can secure any major exclusives with how well PS4 is selling.

No. Devil's Third is probably going to be the other 'large-scale' collaboration Nintendo and Tecmo-Koei have on WiiU.

if half-life 3 is being made it will be exclusive to steam machines. 

its supposed to be a game thats been off the radar for awhile and would benefit from being exclusive

Good to know my favourite gaming corporation has a shit ton of money to throw around :)

I reckon it will either be a new IP by platinum games or a new IP, blue dragon/lost odyssey sequel by Mistwalker.

It's not Platinum that was rumored before this. MS will have more than one 3rd party exclusive at E3 and i doubt that this "Big exclusive" is from a Japanese developer.

There's no way in hell that would happen. Miyazaki is on Beast Souls, which is the new souls game, co dev with Sony Japan.

Possibiles in the real world (maybe a combination) :

Resident Evil

Platinum Games IP

Rainbow Six

etc