In an update on UFC Women’s Bantamweight Champion Ronda Rousey appearing at the WrestleMania 31 pay-per-view, according to a report from FOX Sports, Rousey’s deal to appear at WrestleMania 31 was a once-off and currently, she is not scheduled for any additional appearances.
Meanwhile, UFC tweeted the following last night through their UFC Tonight account.
Ronda Rousey does NOT have a deal with the WWE, her WrestleMania appearance was a "one-off".
— UFC Tonight (@UFCTonight) April 2, 2015