Heyo! It's an interesting idea to be sure and I'd like more details if you have anything further worked out. Also what movie in particular was the inspiration for this?
So if a character had powers through an accident/experiment/serum/etc. and they had a child, would it be feasible for the child to have genetically inherited the powers or a power similar to the parent?
Perhaps the kingdom could be hosting royalty/delegates from other kingdoms that they're friendly with or hoping to build an alliance with to prevent war/strengthen their kingdoms?