My expectations:
Two of the following three games will be announced for Q4: 3D Mario, Mario Kart 8, and Retro's secret project
One of them will get delayed into Q1 2013, most likely leaving Mario Kart as holiday 2013's big game
Other major Nintendo titles in Q3 and Q4 will include:
*Wii Party U4
*Pikmin 3
*Bayonetta 2 (Maybe)
*Wind Waker HD
*Yarn Yoshi
So about 5 major games. Meanwhile, 3rd party support will include
*Assassin's Creed 4
*Batman: Arkham Origins
*Rayman Legends
*Tom Clancy's Splinter Cell: Blacklist
*Watch Dogs
That's about 10 major games, none of them late ports or anything, in under half a year. Not a bad amount.