Well, it wasnt mentioned, but he gonna face 6 to 24 month suspension. Plus add some time for a deeper investigation and double testing. I really doubt that Bellator just gonna wait for end of suspension and let them have a rematch, or pause their current tournament because of that.
I always find it strange when a professionals of such level are so irresponsible towards documents, medicine and etc. Usman said that he took medicine but did not warn athletic commission. I always find it strange, when you earn so much, when stakes are so high, and you use some third party doctors and medicine. I am sure that Bellator has their own docs, they can give at least a consultation.