Yes when there's enough big fighters. Having a window of 60 pounds goes against the idea of weight classes. Why when a guy gets to about 230 does he have to fight people who could be 280 on the night? It's like BJ Penn vs Rampage in some cases.
But if it was to happen and the division was split at 245 as someone suggested, then you'd still get fighters who are around 260 cutting to fight fighters who walk around at 230. I think it should be lower to force the very big heavyweights to stay in the highest division. 230 seems like a good number, probably because it's right in the middle.
I'm not sure how many heavyweights wouldn't be able to make 230 but Cain, JDS, Kongo, Cro Cop etc definitely could.
if both JDS and Cain cannot beat Carwin or Lesnar i would consider it i guess. they are the best two smaller HWs and if they cant do it, likely nobody can (fedor might be able to but we will never know).
until then i see no reason to need a new division.
Frank Mir cant handle the big guys whether he is big or not. its his skill that made him lose, not his size.
Either JDS or Cain beating Carwin or Brock doesn't necessarily mean there isn't a need for another division, it just means the one to do it is an elite fighter. It's like Fitch and GSP fighting at middleweight and (perhaps) being successful there, becomming contenders. We still have the divisions, there's just some fighters in every division that would be contenders in the division above. Except light heavy to heavy because the gap is so huge.