Originally Posted by leifdawg
FWIW, in order to make the HOF you need to decline the weight class change so you can later get a champion vs champion fight. After that you can switch classes.
I don't think this is true in all cases. I finished career mode the other day with my fighter, and I accepted to move up in weight as soon as I could and I got a champion vs. champion fight later after I won the HW belt and defended it a few times and I made it into the HOF as well.