Humans are involved, but it's not what you think.
WayForward Technologies is remaking the arcade classic on Wii and 3DS with 3D environments and new features. No longer limited by an invisible ceiling like in the original, players can run all around the enclosed arenas with the nunchuk while aiming the Wii remote and blasting away with the B button. Thus far in the game's development, the only other move is a stomp (done with A or C) and the D-Pad is for changing weapons. Whether there will be a jump to aid in dodging or exploration/adventure elements is still undecided at this point. I saw very few mushrooms and destructible barriers; hopefully they'll be added in the next several months of development.