I heard Leo retired while browsing some forums so it might be a rumor. It hasn't been verified from Leo himself to my knowledge. Rafael Mendes tapped Leo in ADCC 2009. The kid's was only 20 and he then went on to beat Rubens Charles to win the tournament. I think it's pretty safe to say that Rafael is the man to beat these days, but again that's just one man's opinion.
Royler is the man Eddie should beat though if you ask me. That rematched is hyped to the point where some serious cash and Jiu Jitsu exposure is going to made for sure.