TWO NEW STARS HEADED FOR GOTHAM CITY.

Byline: Marilyn Beck & Stacy Jenel Smith

No matter what you might have heard, you'd better believe that - barring last-minute snafus - it will definitely be George Clooney as Batman and Arnold Schwarzenegger as the villainous Mr. Freeze in Warner Bros.' fourth big-screen installment of the comic-book saga.

All that remains to be resolved are some scheduling problems. Clooney is set to make the feature "Peacemaker" for DreamWorks, and of course there's his ongoing work on "ER." The latter shouldn't be a problem. It's produced by Warners - with which he's signing a three-picture deal that's reportedly one of the richest in the business. It would even be possible for Clooney to make some appearances on the ensemble series while he was making "Batman."

As far as Schwarzenegger, as reported in this column last week, the muscleman is scheduled to start Alan Ladd Jr.'s World War II drama, "With Wings as Eagles," for Paramount in August. And director Joel Schumacher expects to start "Batman IV" in August or September. It could be a squeeze.

Something special: Steven Spielberg is keeping a close eye on "High Incident," the upcoming police drama that marks the first one-hour series under his DreamWorks SKG banner.

"He's around every day, either on the set or in the editing room. He's a part of the process, like a kid in a candy story, fired up about the project," reported David Keith, who stars as a gritty veteran cop on the program that debuts on ABC March 4.

"If this is what he meant when he formed DreamWorks - and said performers would have a chance to provide input in their projects - then he's kept his promise and more. Everyone is being given a chance to make decisions - without a bunch of yuppies around saying, 'You can't do that,' " Keith said. "If you've got an instinct, there are people who want to listen and respond. This is like making a good movie, only at a faster pace. These guys (from DreamWorks) are in high gear, but nothing suffers, and they love trying things that are different." He summed it up by saying, "Man, I am in heaven."

The end: It looks like Jerry Seinfeld and co-stars are really serious about making the upcoming season of "Seinfeld" its final one. They're talking about cutting short their usual summer hiatus and returning to production of the show in time to finish a full season of episodes by December, months earlier than usual - and go on about their lives.