I think Alvarez UDs Golovkin, giving him the crown. I doubt he faces the SD vs Jacobs winner within timeframe and even if he does my money is on Canelo.
Canelo beats Golovkin, then Golovkin moves up and out. Canelo faces Spike/Lemieux winner and maybe one of the top guys over the next 12-18 months. But none of those other top guys (Saunders/Andrade winner, Jacobs/Derev winner, Murata) will do quite enough in that span to surpass Canelo's claim as top man... That would be my guess if I had to give one. Here are some more. If Golovkin beats Canelo, I see him moving up much sooner than later anyways. I suppose my prediction is Golovkin not being at middleweight in 18 months. I hope Murata faces off with one of the top dogs within 18 months but part of me thinks he won't, either way Murata will be rocking as an elite MW in 18 months. I would guess Jacobs is #2, going along with my thinking that Golovkin will move up. If Golovkin beats Canelo, then I say Jacobs will be the man. In 18 months Saunders will certainly have lost a fight and only had two.
Only two things can stop GGG being #1 Middleweight as long as he wants 1.... Another blatant conspiracy in Sept if Canelo makes it though 12. I cannot see the NSAC/Vegas mafia letting Canelo their Cash Moo lose 2 Old Father Time He eventually beats everyone