According to the Wrestling Observer’s Dave Meltzer, new WWE World Heavyweight Champion Seth Rollins was told late Sunday afternoon he would win the title.
Rollins was told later into the show he would cash-in and win the title, and he would need to fly to New York for “Today”, and back for RAW the next night.
After Rollins was informed, Reigns and Lesnar were called to meet with producer Michael Hayes to go over the new finish. This meeting was said to take place at the start of the Ronda Rousey in-ring angle, but the decision had been in the works. Meltzer said Rollins was told last minute of his win, but the title change had been planned out beforehand.
Source: Wrestling Observer Newsletter