Before The Rock announced that he would appear at WWE's WrestleMania 32 in Dallas, it was reported that he likely would not be wrestling on the event due to an issue with an insurance company that didn't want to cover him for a movie if he was going to be wrestling. The Wrestling Observer Newsletter reports that the insurance issue is still there and Rock will not be wrestling at the biggest show of the year.
The Observer also reported that the current main event for WrestleMania 32 is Triple H vs. Roman Reigns.
There's still no word yet on opponents for Brock Lesnar or The Undertaker. Before John Cena went down with an injury, he was scheduled to face The Undertaker in "The Battle of Legends" but that's not happening unless Cena is able to return ahead of schedule. No one expected Cena to get injured so there were no back-up plans for Taker.