If I'm Dana & Joe Silva, IF I have Barnett on the roster, I might hold off on using him right away and have him as a stand-in for the upcoming Werdum/Big Nog II TUF card, as he would be a tremendous fight for either(an III with Nog would be cool) and I think that keeping Barnett on the line "just in case", may keep him honest when it comes to drug testing.
If they want to have him fight right away, I think Nelson, Browne or Kongo would be cool given the options.
MY MMA RANKINGS
HW Velasquez Cigano Werdum Cormier Bigfoot Barnett Mir Browne
LHW Jones Machida Evans Hendo Davis Goose Teixeira Shogun Mousasi Bader
MW ASilva Rockhold Belfort Weidman Jacare Okami Kennedy Consta Belcher Boetsch
WW GSP Hendricks Condit MacDonald Diaz Maia Fitch Kampmann Ellenberger Pyle
LW Bendo Alvarez Maynard Melendez Thomson J.Miller Diaz Pettis Chandler Grant dos Anjos
FW Aldo Mendes Curran Lamas Frankie Zombie
BW Cruz Barao Fernandes Faber Moraes