I would LOVE it if NBC Universal cared about the Xena: Warrior Princess brand enough to do something with it, but ... a crossover movie with Wonder Woman wouldn’t be my first choice. A crossover comic from a good writer and artist who loves the characters would be fun.
As for powers, although Diana’s are pretty inconsistent, she would probably wipe the floor with Xena. Xena battled numerous gods, mobsters, demons, etc, but they were all dumbed down / depowered / easily manipulated / came with exploitable weaknesses. And why do Xena and Diana have to fight? They should team up to take down the baddies, along with Cassie and Gabrielle.
As for Xena’s parentage, she was planned to be a demigoddess at one stage, but the script to The Furies was rewritten at the last minute to make it ambiguous / unlikely (although in my head canon she’s a demigoddess through other means). Xena considers herself to be fully human.