Bat Signal Shines On GM RenCen, Lights Up Detroit Sky [PHOTOS]

Did you see the giant Bat Signal on the side of the GM RenCen during the North American International Auto Show Charity Preview?

The iconic logo was featured on Detroit's tallest skyscraper for some time Friday night -- but why?

It could have something to do with Chevrolet's 9 a.m. announcement Saturday at the auto show. Chevy's vice president is expected to reveal what the company calls an awesome new brand partnership that's sure to excite the kid in all of us.