For the semi's they should do these fights. Winner vs winner in the final show or at the very least, you've got a good alternate developing should they need to step in.
I agree there should be an alternate tournament, but would Fedor 'get up' for a fight with any of these guys???
What is the worse that could happen when it is all over - the HW division will be even deeper with legitimised contenders in Del Rosario, Overeem and Griggs OR Fedor is back in the mix with 2 wins and he could rematch Big Foot or Werdum.