Another thing that does not make sense is that I constantly read that Capcom and Sony are at odds with each other. Narrowing it down to MH specifically, I have read that a deal with Capcom and Sony fell through with the 3rd MH game, on top of Nintendo being aggressive, that's how MH ended up on 3DS for so long.
Expending it further, beyond the MH debacle, you would think the tension between the companies would NOT be in favor for a partnership. Make a MH game for the PS4, sure. A partnership with exclusives and all that jazz? Usually the business relations between companies have to be pretty high for that to happen.
Upon reading further, is it sounds like there is no trust from either end. Blame game, finger pointing, etc, it sounds like a volatile partnership.
I'm not saying a PS4 MH is not happening, but this exclusivity/contract thing just does not add up. My guess is that MH5 will me multi-plat, with a possibility being the PS4 version released first.