If I was the Bamma matchmaker, the main card would look something like...
Rob Sinclair (12-2) vs. Martin Stapleton (12-1) - World Lightweight Title
Curt Warburton (12-3) vs. Ryan Scope (7-0) - British Lightweight Title
Tom Breese (6-0) vs. Bola Omoyele (6-1) - British Welterweight Title
Andre Winner (14-7) vs. Luke Newman (5-1)
Xavier Foupa-Pokam (24-18) vs. Scott Askham (10-0)
Jack Marshman (11-2) vs. Denniston Sutherland (18-9)
Yeah mate, never gonna happen money wise.
Foupa-Pokam and Winner get paid main event money by BAMMA standards, i doubt they'll use them unless they can slip them into a main event or possibly co-main if they get a decent deal.