Def think Toni vs Mercedes a big time match. For the men side lot of stuff including Swerve. I know Omega and Okada come to mind, maybe Jay White as well. I know he faced Ospreay and then BD his run last year but not sure if he's ever faced the two mentioned. Or even MJF. White and MJF aren't as high as Omega and Okada but a strong build can def be made for them. MJF the longest running champ they've had so not like he's an unproven scrub. Same with Mox. Not sure who he hasn't wrestled since he's been champ so many times but can still headline a ppv with plenty of the big names.
I do think the two women might be the biggest cuz they are both champs and Toni is prolly the best character in the business and Mercedes has her resume that looks real strong. I do think it's tough to pull off at this time tho regarding a double champ thing. I know NXT just did it and it may have been kinda early. I know Giulia injured so maybe that led to it but we shall see how Vaquer does as double champ and how they book things. Wouldn't make sense to have a woman challenge Vaquer and be like I want the NA title when the women's title is right there, so same with AEW, why go for TBS when women's is there on same woman. So that's the only difficulty I see. Hopefully they can continue to build up the division where more big marquee matches are possible.