Must Buy Games:

Halo 4
Assassin's Creed 3

maybe:

Far Cry 3
Darksiders 2
Fable: The Journey
Steel Battalion
Sleeping Dogs
Deadlight
Forza Horizon
Lego Lord of the Rings (never been excited for a lego game until now!)
Crimson Dragon

Only the first two games I mentioned are guaranteed buys. The rest are mainly games I'm looking most forward to this year. I usually don't know if I'm going to buy a game until the week of or when it comes out. Depends on the receptions most of the time.

Wii
Project Zero 2
Donkey Kong Country Returns (overdue)

Wii U
System / Nintendo Land (packed in)
Pikmin 3
Project P-100
~Dirt U
~New Super Mario Bros U
~Ninja Gaiden 3
~Rayman Legends
~ZombiU
~Wii Fit U

Lots of maybes e.g. more NSMBU info, has NG3 been fixed enough, I like the idea behind ZombiU but dual analog controls...

PS3:

The Last of Us
Dead Space 2
Bioshock 2
RDR
Mortal Kombat Komplete
Tekken 6

360:

Mass Effect

and I'll get a year of Plus. Kinda worried I might buy Bioshock 2 or Dead Space 2 and then it will end up on Plus for free but they look worth the money now.

edit: Resident 6 for PS3 too of course. 

still gotta get Tales of Graces and ME3

PSVita= Gravity Rush, Persona4, AC3 liberation, COD (if it doesnt suck)

3ds=KH 3d and maybe New Mario 2

Wii=Last Story and...thats it

PS3=AC3, Blops2, Persona (fighting game), Papo & Yo, Zone of Enders collection (maybe), Tekken Tag 2, Transformers, Dishonered (maybe) Sly 4(maybe)

360:
Resident evil 6
Assassins creed 3

3ds:
Kingdom hearts 3ds
Castlevania 3ds

Wii:
The last Story

WiiU:
Pikmin 3
ZombiU

The last of us isn't for 2012 so I won't be buying any Ps3 titles. I'm not even sure if Pikmin 3 will be a 2012 title. If it isn't then I won't be getting a WiiU at launch.

not that many since a few games im interested are confirmed for 2013

as of now spec ops the line, nfs mw, cod bo2, re6, and hopefully gta5 if it releases this year

I'm getting a Wii U and how many games I get depends on how much money I have.

I will definitely will be picking up Mario, Rayman, and Zombi U.

Also, it looks like I will be picking up two Mario games and 1 Luigi game for the 3DS

Only Wii U list as of right now.

WiiU (1pad + 1 normal)
Lego City Undercover
Assassin Creed III
Rayman
Pikmin 3
NSMBU
ZombiU

Total Cost: $700-900 (Saved $400)

Wii: none

Xbox: Halo 4

PS3: Black Ops 2
Assassin's Creed III
Tomb Raider

PS Vita:
Gravity Rush
MGS:HD
LBPV
LBP Karting
Sly 4
Unfinished Swan
AC3 Liberations
Black Ops Declasified

I'm sure I'm forgetting a lot.

Hmm.... these are my planned purchases for the remainder of the year for now:

Gravity Rush
Tales of Graces F
Kingdom Hearts: DDD

AC3/AC3 Vita (maybe)
CoD Vita (maybe)

There are probably more that I can't think of at the moment, but then again I'm pretty strapped for cash.