With the unexpected news that somehow, Batwoman is going to be brought into the CW, through their annual crossover of shows; Arrow, Flash, Legends and Supergirl, I wonder if
Bette may actually make it into the mix?
Several years ago there was speculation that the character of Bette would show up in 'Gotham' (which I never watch, way to over the top for me) but I think that would have been a mistake, given the miss-matched time-line of various characters.
I think Batwoman's descent into the CW should acknowledge that not only is she an established character, but has a real back-story ////// which I hope can include her cousin.
Let's face it, on occasion, the CW has tweaked various hints or Easter eggs before. A Bat team, two women would have the resonance of Bats and Robin (whichever versions)
and most fans would love!