I'm usually not one demanding multiplayer, but I was thinking a LAN option would be nice to play against another human who could control the enemy carrier. I didn't think big enough to imagine one carrier per player, awsome idea!
Timewarp could be troublesome, unless perhaps they could just ignore it and have individual timewarps (Philadelphia Experiment style) for the carriers.
Even games like Civilization V and Shogun 2, which one game can last for days, weeks or even months, have multiplayer. I don't think the length of the game would be an issue when considering multiplayers.