Excellent point and yeah, I'm well aware of Rua's career highlights and that's why I used the words "shocked the world" about Griffin's victory over him. But if Shogun had a torn ACL in that UFC bout, it only goes to show that Griffin didn't beat the real Rua so I hope he has enough to beat the UFC version of Rampage.
I'm a HUGE Forrest Griffin fan. He's my favorite LHW and I'll be rooting for him vs. Jackson just like I did vs. Shogun Rua. He showed some huge leaps in grappling vs. Rua so he's benefitted from having Randy Couture training him. Hopefully Couture will have him ready this time. Perhaps I'm operating on the public perception of Quentin being "unbeatable" but Shogun did demolish him in Pride FC so maybe a relatively inexperienced Forrest will too. I just can't favor Griffin in this matchup.