There is no game called Fantastic Four developed by Adventure International on the systems described. (I believe that this is actually supposed to represent Questprobe Featuring Human Torch and the Thing, making it redundant.)
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Looks like you're right. The developer and publisher even match up with the Apple II release listed here: http://www.mobygames.com/game/questprobe-featuring-human-torch-and-the-thing/release-info
Actually, it looks like it said "Fantastic Four" on the floppy, but it's definitely the same game: http://www.ebay.com/itm/FANTASTIC-FOUR-video-game-Commodore-64-Computer-/140739167899?pt=Video_Games_Games&hash=item20c4b5469b
"Fantastic Four" should probably be an alias for the real entry anyway....