#1 Ronda Rousey vs Charlotte Flair vs Becky Lynch (RAW Women's Championship)

The presumed main event of Fastlane will be Becky Lynch vs Charlotte Flair with the stipulation that if Becky wins, she is re-added to her rightful match for the Raw Women's Championship, and it becomes a triple threat main event at WrestleMania.
She will win on Sunday, otherwise, the fans in attendance will quite literally cause a riot. The story after the Man won the women's Royal Rumble match has been pretty complex and is likely to confuse some people, but it will all boil down to the triple threat at 'Mania.
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The most recent turn this story took was Ronda Rousey's sudden heel turn and subsequent beatdown of Becky Lynch. This is exactly how Rousey should have been booked from much earlier, with a video of her somewhat burying the business going viral on social media.
It does not matter if this is a work or a shoot, WrestleMania must end with the Man victorious. It could come at the expense of Rowdy, or her longtime rival, Charlotte, but there is no other option besides ending the biggest show of the year with the biggest star in the company standing tall with the championship in hand.