I could see having completely separate women's teams.
But having 2 times as many teams would seem like a lot of server load for uncertain interest, even if you need relatively minor game tweaks (faces and names), adjustments to GE for the style of play.
Alternatively, you could limit owners to one team. But would that attract additional people to BB? There are currently 27,000 teams. Would even 10% switch if they could? Would it attract an additonal 3,000 people who aren't currently playing BB?
If you allowed someone to have 2 teams (one men's, one women's) if they had supporter, you could maybe get some more interest - but this might not be lasting, as supporters might start a 2nd team, and then when their supporter lapsed, they would drop the women's team.
So perhaps you could have a 2-team option for $X (less than supporter)
But if there were going to be 2 teams, I'd prefer a college level men's team.