Porter, winner of Khan/Collazo I think the last one standing out of the 3 should fight Floyd. That would make for a spectacular fight.
I agree Bradley needs to stick to 140, cause he can't hurt natural Welterweights Top 3 Welterweights are too much for him... #1 Keith Thurman #2 Floyd Mayweather #3 Shawn Porter
Khan/Collazo winner, Porter/Brook winner, or Mayweather/Maidana loser. Guerrero would also be a good one. Imo Thurman is still in the "improving rapidly" stage. He isn't ready to take on Floyd yet, and Porter/Khan would actually be really big challenges, even though Khan would only survive maybe half of the first round.