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Viper got the optic laser move in Ultimate Marvel vs. Capcom 3. Presumably as a homage to Cyclops, who was left out of the game.
And there is a Hadoken animation for Mega Man in the game, it's just unlocked via the one secret code, holding Jump+Shoot for six seconds on the title screen. Then you can throw Hadokens via QCF+Shoot motions.