UFC 146, the next scheduled pay-per-view event after Saturday's, is stocked with heavy hitters. Literally. All five main-event fights on the May 26 card in Las Vegas feature heavyweights. But at least one of the bouts, the division title fight, is in jeopardy: Alistair Overeem, the scheduled opponent of current champion Junior dos Santos, failed a prefight drug test with a high testosterone-to-epitestosterone ratio. The Nevada commission will rule on Overeem's eligibility next week, and if he has to be replaced, it could affect the composition of the other heavyweight fights on the card. Meanwhile, with Overeem's status in doubt, with previous champ Cain Velasquez still shaken by his brutal loss to Dos Santos in November and with another former champ, Brock Lesnar, headed back to the WWE, the entire heavyweight division is in flux.