What To Do???

My big summer project is to get the front bedroom re-decorated. It currently has wallpaper on it that is probably older than us -- pretty little flowers all over it and the other 3 walls are the opposite of this one. The biggest problem is this wall though -- the top uses plywood and a 4x2 or something used to hold up the lighting and the bottom storage shelves are all mdf board (which, upon research, may emit urea formaldehyde if not properly coated --awesome -- which I'm doubting wallpaper prevents, so need to Kilz it a few times). Anyway, we are looking for a way to re-do the room, keep it gender neutral (we are thinking it will become James' room when he's ready but it's not set in stone) and leave some room for personalizing when the time comes (stickers? decals?) Open to any suggestions on colors, design ideas, etc! Thanks!
I'm so happy this wallpaper is coming down easily -- I guess it helps that the glue has given way after +30 years of being up!

Can't just rip it down because there is no carpet down behind it and the electric is running in there too to some degree.