Sometimes, rather than display the dossier for Daniel, the only confirmed Mastermind, you would instead see info on Annette Birkin. The brilliant Umbrella scientist and wife of the G-virus monster, William Birkin.
Like many speculated, her special enemy is her dear husband, William, in his Stage-1 G form.
Whether or not there will be more Masterminds is still up in the air. If there are, hopefully, we’ll see them before the official launch of Resident Evil 3 in April of next year.