Does your kids bedroom have a theme?

My daughters bedroom at the moment is kinda jungle themed with a very faint green colour on the walls (was like that when we moved in) and I just put removable jungle animals everywhere and there is a big bright 3D canvas elephants wall hanging and a green stripey rug on the floor. We are moving house and next year want to have another baby, we are hoping the new baby is a boy in which case he can have the jungle theme and my daughter can have something else. The problem is that I already have her toddler bed and it has the little mermaid on it, I HATE ARIEL!! I can't stand it but Im not throwing it away, we havent even used it yet, I was thinking maybe an under the sea theme for her? She likes fish and she loves nemo, but would her room look stupid with nemo and various other fishy things and then a stupid Ariel right in the middle? Sorry I really hate ariel.