The Super Mario Galaxy Movie is here, and Mario creator Shigeru Miyamoto says it's finally allowed him to put "some meat" on an idea that he and Super Mario Galaxy game director Yoshiaki Koizumi discussed during the development of the 2007 game, but never actually "came to a conclusion" about.
Before we get into it, there are some implied spoilers below for The Super Mario Galaxy Movie, but we're not going to go into the full details in case you've not seen it yet. However, you might want to scroll with caution if you want to go into the new movie totally blind.
