Pokemon, DQ, and Smash all come to mind with this. they're already Zelda'd out, they'll show off Mario Kart and Mario 3DS. and if this is 3DS related, those 3 series all have something that can easily work for it (DQX can always be Wii/3DS, Pokemon Grey could be 3DS, and we know Smash is being worked on but nothing more - a legit showing could work out for that).
--
The future must protect the clone's past.
"Maybe it's a tentacle, molesting the planet itself. - Aschen Brodel.