Rumors for Golovkin-Lemieux are swirling in the ether right now.
GBP apparently looking at October 17 (to be clear, K2 has MSG locked down for this date), a week before HBO airs Klitshko-Fury. Wouldn't be surprised if Chocolatito ends up on the card again (probably against Segura or Viloria).
I love this fight and think Lemieux is dangerous, but would be surprised if GBP is really that eager to offer up two of its biggest names to GGG back-to-back: Lemieux fresh off of his comeback and then Canelo should he emerge victorious over Cotto.
All that said, I think the fight otherwise makes a ton of sense logistically (would be a unification fight, which is Gennady's top priority, and a perfect setup for Cotto's or Canelo's 2016 mandatory against him).