I don't see it to be honest. He said he wants to face the WW champ after Marqudat wins it. His BAMMA deal is likly better then a ZUFFA deal would be and he could make a hell of a lot from the Marquadt fight, if he defeats him however then yeah I think ZUFFA would put an offer on the table.
But as I posted in my BAMMA 9 MM thread a four man WW tournet type thing would be awesome for the belt.
BAMMA 9 Marquadt vs Yoshida (WW Title) Daley vs Wallhead (Title eliminator)