Actually, I believe that they're making an entirely new Mega Man game for the PS2.
But, it's not unheard of to port really old games to nextgen consoles. I just bought the Sonic Mega Collection for the GameCube, I think all the original Final Fantasies have been made into updated Playstation versions, and they package the first two Zelda games with the purchase of a new GameCube.
But as much as I would like to see an updated version of Wing Commander, there are a few problems. Updated graphics would be great, but the gameplay wouldn't be anything special. And as for having Mark Hamill (or any other actor) do the voice; why would a... fifty? year old man do the voice for an early twenties rookie? Yeah, he did it in Academy, but that wasn't exactly a work of art. Kinda like the same reason he didn't star in the movie.