Werdum's enhanced training regimen focusing on strength and conditioning, coupled with his marked standup development has given him impressive tools to complement his "best in the world" BJJ, which put together makes him a threat to everyone at HW.
I wouldn't be surprised in the least bit if he ends the year as HW champion. Cain and Cormier probably wouldn't want to mess with his guard, so it'd be a striking affair which I think would be somewhat close and all four other top HWs(Cain, JDS, Cormier and Overeem) will have a difficult time at this point in Werdum's career, as he's not just a grappler anymore. Not to say he could beat all four at this juncture, but he's legit for sure.
MY MMA RANKINGS
HW Cain JDS Werdum Cormier Barnett Bigfoot Overeem Mir Browne Nelson
LHW Jones Machida Evans Hendo Goose Teixeira Davis Shogun Mousasi Bader
MW ASilva Belfort Weidman Jacare Okami Rockhold Kennedy Consta Bisping Boetsch
WW GSP Hendricks Condit MacDonald Diaz Maia Fitch Kampmann Ellenberger Pyle
LW Bendo Alvarez Grant Melendez Thomson J.Miller Diaz Pettis Chandler dos Anjos Gray
FW Aldo Mendes Curran Lamas Frankie Zombie Cub Lentz Kawajiri Siver