The last time we saw Penn was UFC 136 when he was beating by Nick Diaz. For his career he has always been considered a top pound for pound fighter and a win against the top up and comer in the world could get him right back into that title picture and P4P discussion.
MacDonald is coming off of a very impressive win over Che Mills and is already gathering momentum for a title shot. He trains with GSP and has stated many times that he doesn't want to fight him and he wants to build his way up to that. If GSP loses to Condit does a win over the biggest fight of his career give Rory a title shot? This fight could have some huge implications!