MercurySteam already said they're not porting Castlevania: Lords of Shadow 2. Unless Konami got another team to port the game, you'll be sorely disappointed. I don't think I'd want a version not handled by MercurySteam.
Wasn't there a rumor not too long ago about Nintendo intentionally holding back marketing and announcements while they ironed out some of the issues? I guess that makes sense in a weird, backwards kind of way. Should they market Wii U with so little to show currently? I can see why Nintendo would be hesistant right now. Before the mid-April update, Wii U updated out of the box and still ran annoyingly slow. Not the best first impression. A summer update is supposed to improve things further. These shouldn't have been problems, but since they are, holding off until they aren't isn't the worst strategy.
And if Nintendo did score some major titles, it may be possible that they asked publishers to wait until E3 to announce a Wii U version when those games make their real debuts. That way, Nintendo rides the positive buzz out of E3 for a summer push that starts with Pikmin 3 followed by a number of first and third party titles for the rest of the year. Wii U would have a pretty good second half of the year with Pikmin 3, The Wonderful 101, Wind Waker HD, 3D Mario, Grand Theft Auto 5, Call of Duty Ghost, and Mario Kart U among others like Batman and Assassin's Creed IV.