If Cotto doesn't fight Canelo or GGG does it even matter who he fights?

Agree. As long as Cotto gives up his title, it doesn't matter who he fights.

I think it matters. When he won the lineal world middleweight championship everything he did and does after that matters. Is he a fighting champion who gives the best middleweights a chance to win his title? Is he a cherry picker who fights smaller fighters like Bradley or Rios both of who have little chance to beat him and never fought above 147 before? Is he a world champion who fights less than once a year? So far as a world champion I would give Cotto an F grade and the middleweight division would benefit from him giving up his 160 pound title. Then Cotto could fight someone he knows he can easily beat once every other year and it really wouldn't matter.

Rios will destroy him, but since he going to rocnation and pretty much stabbed top rank in the back he wont be fighting any top rank fighters unless rocnation puts up some huge money.

No. Unless it is Lara or Jacobs.