Sony: Killzone
Microsoft: Fable
Nintendo: Pikmin

God of War - I love the franchise but I want something new from Sony Santa Monica.
Killzone - I enjoyed each of the games but it never progressed into a top-tier FPS, time for something new.
Halo - I never understood what made Halo so good, they all seemed pretty deeply flawed to me. Like Killzone, the series never really evolved the way it should have.
Final Fantasy - I used to love this series but good god, what happened?

Assasins Creed must die

Microsoft: Fable - The series is in the toilet if you ask me, I loved the original, but every one since hasn't been as good.

Sony: God Of War - The series has run it's course with 3 main entries, and 3 side stories. Enough of Kratos, take the concept and introduce the combat/gameplay into a new IP with a new character and setting.

Nintendo: Wii fit - The industry has no shortage of fitness games and I seriously doubt anyone has lost a pound of weight from these games.

this

Halo, Wii____, Killzone

honorable 3rd party entry:Dynasty/Mousu series

Super smash bros. I'm just sick of this game, just hearing about it I feel hateful... it's a simplistic party game in the guise of a fighting game, recycling graphics and characters from other games for 10 years, bringing as much novelty as a remake, it's horrible... and still it manages to be awaited, achieve great sales and make consoles sell better. I don't want it just to be killed, I want to kill it myself... bare hand. And spit on its grave.

Killzone, because even if I like the background and style and played it quite a bit, it's extremely far from being such a great game it can afford to be the main Sony's FPS for 10 years and 3 generations of consoles. It's not great enough to make other game copy it, or for it to sale a lot, or for me to finish any KZ I bought. Time to move on.

For MS, I'm not a big fans of their licenses, but I can't think about a game I'd wish to be dead. I think one of the reason is that they don't have so many licenses that lasted 3 generations or even 3 games. Even if don't like it, I don't see any reason to wish a 2 game license to die.

I never thought much of it either.  My son plays it and thinks its great.  I asked him what was so great about AC4 compared to the others and he said"?".  I asked him what were the reasons that he wanted to play it?  He said "it's more of the same thing".  So, if you want more of the same thing, with little to no advancement in gameplay, then AC is it...

PS : killzone

X1 : forza horizon

WiiU : none

I wouldn't kill any series because people enjoy them, big ones from each I care nothing about.

PlayStation - Gran Turismo (I am not a car guy and so many other series I like from Sony)
Xbox - Halo (because Gears of War makes my wife happy)
Nintendo - Wii Sports (I want Earthbound...and Star Fox...and Metroid)