q1 is somewhat supported. brain age, luigi's mansion, and pokemon mystery dungeon are at least there, and they're supporting fire emblem in a huge way.
q4 is probably pokemon, animal crossing and something else (zelda?). the middle of the year looks really barren. and that's without considering the upcoming wii u woes.
I think 2013 will be better for 3DS than 2012.
Q1 - Brain Age, Fire Emblem, Pokemon Mystery Dungeon vs Kid Icarus
Q2 - Probably Luigi's Mansion: Dark Moon vs Mario Tennis Open and Ghost Camera
Q3 - Probably Animal Crossing: NL vs 3DS XL and NSMB2
Q4 - Pokemon X&Y vs Paper Mario: Sticker Star, Prof Layton, et. al.
With more games to be announced probably being Zelda and something from Alpha Dream (and random games from SPD probably), the lineup will definitely help keep people buying.
At the very least, it should do better than 2012 until August. By then, new games should be announced and momentum could keep up. Also, price drop by Fall is expected. DS will see one final price drop before production ends officially by the end of the year.
Wii U has LEGO, Wii Fit U and G+W this quarter...not good to build momentum. Pikmin 3 will be a nice blip on the radar, but Wii U will only do okay until Nintendo's first big release setup this holiday (Retro, 3D Mario, Good-Feel probably, etc). I say new game announcements will happen sooner rather than later.