I'm pretty sure we already know Wooly World and XC:X are slated for the first half of 2015.
Woolly World, yes. Xenoblade X, no, and I don't expect it to arrive before the next E3, though tomorrow could always surprise us.
The big thing to look out for tomorrow, aside from Amiibo details for games that are not Smash, will be whether the titles explicitly marked for the first half of 2015 last E3 are still on track (Woolly World, Mario Maker, Splatoon), and whether Xenoblade X, Kirby and the Rainbow Curse, and Code Name: STEAM are joining them.
Smaller eShop titles could always arrive as surprises on short notice, as was the case with both NES Remix games and will likely be the case with the Mario vs. Donkey Kong title we have known about for a while.