Prequel does NOT mean the previous release. The word is a combination of "previous" and "sequel". A previous sequel. If the work was made before, it cannot possibly be a prequel.
No, this not up to debate or "I think it means" or "I would call it a prequel" crap. The word was coined specifically to cover sequels that took place before the original.
"a work (as a novel or a play) whose story precedes that of an earlier work"
A flashy-first game is awesome when it comes out. A great-first game is awesome forever.
Plus, just for the hell of it: Kelly Brook at the 2008 BAFTAs