Allen’s unanimous decision victory over Melquizael Costa in the May 2026 main event preserved his top-10 featherweight standing and kept him in the mix for high-profile bouts against other ranked contenders. Youssef Zalal sits atop the market at 37% as the logical stylistic and ranking fit, given Zalal’s recent activity, grappling pedigree, and shared trajectory toward the upper division. Lower-probability names such as Aljamain Sterling, Jean Silva, and Yair Rodriguez reflect possible rematches or cross-division interest following Silva’s prior win over Allen, while veterans like Alexander Volkanovski and Movsar Evloev remain long shots tied to title implications or scheduling. Lerone Murphy registers minimal odds as a regional rival with less immediate momentum. Trader consensus therefore centers on Zalal as the most probable next opponent absent an intervening announcement.