Actually no it was supposed to be Bret vs HBK rematch, with Bret going over.
Can't remember where I read it but the HBK/Bret rematch was supposed to be at WM 13. Shawn bailed, the double turn happened instead and from that point, Bret vs. Austin was in the books for WM 14 where Austin could finally go over.
D'oh you'd be right. I was thinking Mania 13... sorry.