As first reported on WrestleMania Today on the WWE Network, the Andre The Giant battle royal has been moved to the WWE Kickoff show. The Kickoff show is scheduled to run from 5 to 7pm eastern but the Kickoff show match was scheduled to air in the final half hour. I would suspect that they would air one match earlier in the 6 o'clock hour unless they want to rush the battle royal and the tag team title Fatal 4 way match that is also scheduled for the Kickoff show.
The reason for the battle royal move is because they felt that they needed more time for some of the key matches and angles. I was also told that the Divas match will get more time than they usually do at WrestleMania.