Canelo/GGG is my bet. Canelo will probably move to 160 in a year or two, and i doubt Cotto is able to hold the lineal title hostage for that long. Canelo has shown he's willing to fight anybody and GGG is on the brink of s****om. Put a mexican fanbase behind a GGG fight and you have a winner. Only issue is that GGG is HBO and Canelo is locked in on Showtime.
There's nothing even remotely on the horizon that has the appeal a fight like this has. Been a long time boxing fan but, honestly, only occasionally tune in now. Of course this was one I've been waiting on for awhile. These kinds of fights, though, are getting fewer and far between. Have to wonder about the future of boxing.