could they ever possibly fight? 

silva easily
silva is 2nd best pound for pound fighter in mma ever ...right after Royce Gracie
silva easily
silva is 2nd best pound for pound fighter in mma ever ...right after Royce Gracie
Anderson beats everybody you listed. You think Rampage or Rashad make it 4 or 5 rounds against Anderson? And don't put too much stock in the whole Jones beat 4 former champs. Only Rampage and Machida defended it more than once, and Machida's defense was tainted.Bones best Wins: Bader, Shogun, Rampage, Machida, and Rashad.
Silvas best wins: Vitor, Sonnen, Hendo, Marquart, and Franklin.
Bones has had zero trouble with his best opponents. I seriously believe Bones would rain down Hellbows on Silva to a TKO win.
if they fought at a catch weight, would it be the biggest fight in UFC history?
if they fought at a catch weight, would it be the biggest fight in UFC history?