It’s shaping up to be a traditional Super Bowl Sunday: A six-hour pregame show followed by football, snacks, drinks, aliens, surface warships and Liam Neeson. The last part might need an explainer. “Battleship,” the action movie somehow based on the board game of the same name, will debut in theaters this May, but you’ll get a new 60-second sneak peek during the first quarter of Sunday’s big game, Deadline New York reports. We’ve shown you earlier, longer trailers for this one before, but this’ll be the biggest audience yet for the SWOs-vs.-aliens adventure, which stars Neeson, “Friday Night Lights” youngster…