I just saw a note on FightOpinion.com that Dave Meltzer of the Wrestling Observer is reporting that in addition to Yoshihiro Akiyama, Ken Shamrock is being looked at as a possible last minute replacement for Kazushi Sakuraba against Royce Gracie this Saturday.
To my knowledge, Sakuraba hasn’t been officially ruled out for Saturday. However, he’s yet to receive medical clearance and is scheduled for more tests on Tuesday and Wednesday. There’s no word as to whether Shamrock is receptive to the idea of fighting Gracie on Saturday. The two have fought two times previously.