I wonder what a prime Fedor would do in todays UFC. His striking is arguably world class, still at his advanced age, nevermind when he was 29.
Grappling and wrestling he doesnt have many peers at HW, so he would be able to stuff Cormier and stifle all of his mummy bullshit, while holding a clear striking advantage.
I think he is just too big for Jon Jones. Him losing to BJJ wizard like Werdum is forgivable, so I really dont see anyone who would give him an honest challenge.
40 year old Fedor is still a great fighter, but father time always wins and it's most likely going to end badly for him unless he beats Bader then walks away.