Warren/Mayday was the fight to make cause it would be a name debut for Mayday and a fight fans would be interested in.
If he beats Warren he'd get a title shot after Caldwell.
Guess its possible since he's coming off getting KO'd by Lineker they want to give him an easier debut fight to get him back on track.
Really since BW div isnt in that great of shape after Caldwell gets his shot they could give Mayday a title shot after one win over anyone. Doesnt have to be Warren. It could be LC Davis, Baby Joe T, anyone really.