If the Big Show vs Akebono match falls through for Wrestlemania the backup plan is for Big Show to face Orlando Jordan for the US title.
Both the IC title and the WWE Tag Team titles are not scheduled to be defended at Wrestlemania.
The addition of Kane into the Ladder match at Wrestlemania was a last minute change before Raw aired last night. The original plan was for Gene Snitsky to be in the match but that idea was scrapped.