It is the right short term solution, although it kinda feels like they're trying to milk Lesnar for all he's worth before he jacks it in. You know, TUF ratings, help make JDS a star, take a beating then leave. Who knows, maybe he'll surprise us, and he certainly has more of a chance than against Cain. Just don't see what he personally will gain ability-wise from doing this in the build up to the fight. Perhaps he overpowers JDS then heads into a Cain rematch like a man on a mission, works his striking like a maniac, lets people punch him in the face for fun, and we see a different fight. That would be pretty cool. Was shocked when I saw his UFC striking accuracy was 77%, though presumably that's mostly comprised of ground and pound.
Either way, glad JDS took the fight, in fact, I think anyone in his position should be obliged to. Title shots are earned on a circumstantial basis, and if circumstances change, they shouldn't be able to just sit out for a year and further weaken a division lacking a champion. The route Rashad Evans has taken really irks me. If they lose, they lose out big, but that just would prove that going into the title match when it was now able to take place, somebody else was a more deserving challenger.