CV 3, probably. For two reasons:
1) You have potential for action and story. Four main characters with different motives fighting for the same goal. This creates the potential for having a layered story, which is much more interesting to follow than good guy fights bad guy.
2) Excusable liberties. There was not much of an actual storyline presented in the original NES game, save for the introduction and a few text boxes. With this in mind, the writer has a lot more legroom to present a story using the game as a basis. In effect, there's not much that a screenwriter could fuck up.
Only two problems:
-If the writer sucks, the liberties s/he does take could make the movie worse than it needs to be.
-If not enough fan service is in there, then fanboys going to theatres with a chekclist won't be pleased enough.
(Ok, Vampire Killer, check! Sypha, check! Pot roast...what the...WHERE'S THE FRIGGIN' POT ROAST!! UUURRRRGGGHHH WORST MOVIE EVARRRR!!! RAGEEE RAGGGEEEEE!!!11eleven)