What will be the big holiday title(s) for 3DS in the west?

[zorg1000]

Fusioncode said:
They'll probably announce X2/Y2 at E3.

That's what I thought until they announced Pokemon Super Mystery Dungeon for this holiday in America, I just can't see them releasing both those so close to each other. I feel like Mystery Dungeon's sales would be affected by a mainline title releasing at the same time.