Modern warfare.
Or at least just slow the fucking release time down.
The Mario party games. They were a nice idea at first, but after nine of the things, I think we can move on.
Any of the floodware wii games.
I think most series dont need to stop, they just need a bit of intermission. Being bombared with CoD, Halo, Metroid, mario, is aggravating even to the most die hard of fans.
I actually think Nintendo have Zelda pretty well done release wise (not including the myriad games on the hand-helds, I grant). It's usually one or two per console, but the franchise is made to seem more overly-abundant by the mechanical production of mario and metroid games. I really wish Nintendo would just deviate for fuck sake. We know they're a good game company capable of producing brilliant games, but nobody at all would object to a new franchise at this point. Something fresh to the table!