A heavyweight bout between Brendan Schaub and Stefan Struve has been agreed to for early 2011.
Heavy.com confirmed the switch with a source close to the organization. Sportsnet.ca first reported the change on Monday morning.
Mir could ultimately end up facing Brock Lesnar for a third time.
Schaub last competed at UFC 121 in October, defeating Gabriel Gonzaga by unanimous decision to send Gonzaga packing from the organization. He has scored three wins in a row after losing to Roy Nelson in the finals of the Ultimate Fighter 11 tournament.