The “Batman Begins” premiere was supposed to be Christian Bale’s big night. After all, the man in the bat suit hasn’t been onscreen in eight years. But no one seemed to care about the headliner, much less the acclaimed supporting players including Gary Oldman, Morgan Freeman and Liam Neesom. For the anxious press and fans outside the Mann Chinese Theater, Monday night was the (incredibly frenetic) Tom and Katie Show.As expected, Cruise came to support Holmes, who plays Rachel, Bruce Wayne’s childhood friend in the prequel. The lovebirds have been joined at the hip since being outed in Rome more than a month ago, which begs the question: Will they be working together soon? “We haven’t come up with anything just yet,” Holmes said, while her new boyfriend was across the street signing autographs for screaming fans, “but I’d be honored to do a film project or anything else with him.” The hot couple must have been exhausted from all of their recent public appearances because they didn’t stay for the sumptuous after-party in the Kodak Ballroom, decked out like the Bat Cave with billowing smoke and gigantic faux bats. Not that the rest of the cast appeared to notice much. Caine and Bale chatted at length over cocktails, while Freeman boogied down with granddaughter Alexis on the dance floor.