Resident Evil has always been considered an action game from a development standpoint. And, were they to say 'Horror/Action', everyone would already know what they were showing off before they showed it. That in mind, I have a fairly good idea what the games from them will be at E3 (according to that list, anyway).
Action>PC/PS4/Xbox One - Resident Evil or Devil May Cry
[Honestly, I'm leaning more towards Devil May Cry, seeing as there hasn't been a new one since DMC. I have no doubt we'll hear something about a new RE game this year, but I feel like they'll wait for a later trade show. E3 would be a pleasant surprise, of course!]
Adventure>PC/PS4/Xbox One - Monster Hunter or Dragon's Dogma
[Leaning more toward Monster Hunter here, as those games sell massively.]
Fighting/Wrestling> PS4 - Street Fighter V
[Unless Capcom have decided to make another of their fighting franchises Sony exclusive/a totally new franchise, this is the only logical game it could be.]
It's very unlikely they'll be making a bunch of new IPs right now, considering their financial woes. It makes more sense that they'll buckle down on their top franchises, and attempt to deliver the best games they can within them. Of course, I could be wrong, and every single thing they show at E3 could be a totally new IP, but that would just be completely illogical.