Meltzer added that the thought behind this would be for WWE to have its two biggest female superstars clash off in the event. Nikki has been one of the top mainstream talents over the past decade, and she earned much more publicity during her high-profiled six-year relationship with John Cena.
That being said, Meltzer did caution that things could always change, and WWE could opt to roll with another main event later on. But for now, fans can prepare for a Rousey-Bella match to headline the historic pay-per-view.
There are two matches confirmed for the show so far. Hall of Famer Trish Stratus will battle former Raw Women's Champion Alexa Bliss, while NXT talents Toni Storm and Io Shirai will clash in the finals of the Mae Young Classic.
Rousey defeated Bliss at SummersSlam to win the Raw Women's Championship for the first time in her career. She's easily the biggest name in the women's division right now, and it shouldn't surprise anybody that WWE would want her to headline the historic Evolution show.
Bella has only competed on a part-time basis over the last two years, as she had a lengthy recovery from neck surgery. Her last televised match was at the Royal Rumble pay-per-view, where Nikki turned on twin sister Brie before losing to Asuka.
Nikki's last match took place in a March house show, where she and Cena teamed up to defeat Sonya Deville and Elias. But if she's truly set to face Rousey, we can expect more televised appearances in the immediate future, as WWE tries to build up towards what will be a show for the ages.