Perhaps, but it's unlikely - how many sequels do you actually see coming from video games these days? Or ever, for that matter?

"Masterminds"? The Keyblade chooses its own weilder. It must have been created by someone, but it is highly unlikely. There's a forum somewhere that disproved this, and there was evidence, but I can't find the link, unfortunately. The Keyblade does not answer to a person, really, but to the heart and its strength.