From rllmuk, on Konami's 3DS possibilities:
KONAMI
Baseball franchise
Contra franchise
Frogger franchise
HIDEO KOJIMA’S METAL GEAR SOLID SNAKE EATER 3D
“The Naked Sample”
PRO EVOLUTION SOCCER franchise /
WINNING ELEVEN franchise
Can't see Castlevania there yet. Nintendo conference had a lot of technical problems (Zelda), but easily overrode the poor MS effort. I'm warming more to Metroid now.
That's the initial list. I don't doubt we'll, eventually, see a CV game for the 3DS. I mean, Capcom didn't list any Mega Man games for the 3DS either, and I'd think THEY'D go all out with the Blue Bomber. They COULD be holding something up their sleeves, as well, waiting until the 3DS gets better established, then bring Mega out.
And, that picture of IGA playing LoS cracks me up. It looks like IGA's thinking to himself, "So, THIS is how you do it! My god, I thought it was the other way!! Well, if I ever get to do another 3D CV game, I'll be sure to play this one with a notepad and pencil in hand."