Originally Posted by JB-the-Hunter
It doesn't count because of the context of which the OP is implying. If you actually read what the OP wrote, it's clear that he means a fourth film like X-Men 4, Spider-Man 4 or Iron Man 4 would be. Since X-Men was the first movie in its series, in the context of which this thread was made, any prequels should only count as -2, -1, and so on. The Star Wars prequels, in the context of which this thread was made, should only count as -3, -2 and -1, while the originals should count as 1, 2, and 3. So no, there has not yet been a true #4 Marvel movie yet.
This is the most bizarre "method" of counting I've ever heard of. "Star Wars -3;" "X-Men -1."
Here in the real world, a "prequel" is still a sequel;
it's just placed ahead of the others in chronology. But it still counts as an extension of the series.
But have fun with whatever exciting and new counting systems you and Psylockecolossus can come up with.