He already turned down a 15M dollar offer for a rematch with Conor - according to his uncle Alex Nurmagomedov. I can imagine it’s true, as these guys are not really interested in money (very different culture, Khabib still lives with his dad and mum and brothers in the same house) and there were already rumours about that, that he wants to retire after the McGregor fight. Finishing Tony in April/May would be the perfect end.