WrestleMania is looking difficult to book this year, at least until after the Elimination Chamber. I'm still not convinced the plan is Strowman vs. Lesnar despite the recent ongoings. Will they do a Triple Threat match where Roman pins Lesnar, so they can go with Strowman / Regins afterwards when Brock leaves? I'm just not sure what Roman Reigns can do at WrestleMania if it isn't the World Title match. Whereas Braun, he could probably put an end to Kane's career, considering they've dragged it out this long now. Kane could also cost Lesnar the Chamber match in the build up to WM. For that reason, until the Chamber is done, I'm saying:
Brock Lesnar (c) vs. Roman Reigns
Braun Strowman vs. Kane
AJ Styles (c) vs. Shinsuke Nakamura
As for the women, I honestly think they don't even have the final plan yet, which is why Rousey said nothing (and still hasn't) and Asuka still hasn't picked. Odds are it will be Asuka and Alexa to duke it out, while Rousey may face Charlotte. Paige's injury has probably screwed this up, as she would've likely been in a title match vs Alexa, with Asuka vs Charlotte and Rousey in some kind of mixed tag match (partner to Angle or The Rock). Right now, despite reports the mixed tag is still the plan, I'd just expect:
Alexa Bliss (c) vs. Asuka
Charlotte Flair (c) vs. Ronda Rousey
There would probably have to be some more Women's matches somewhere, but it's hard to fit them into the card. They need to have a Women's Battle Royal on the pre-show.