I don't know how I feel about those spoilers. Annoyed, mostly. It's not a direction I want to see either character taken in, to be honest. And, yes, the spectre of future cosmic Dr Manhattan induced handwavium does cast doubt on the whole affair.
I do know that DC did screw up Batwoman massively back in the day. It went from a top tier book to worthless literally overnight. Thankfully Tynion and Detective Comics eventually came along to redeem the character.