The Wells Fargo Center's website has four matches listed for the card, though it should be noted that card, as always, is subject to change. But as of right now, the four matches being advertised by the venue's website are:
-WWE World championship/Triple Threat match: Kofi Kingston vs. Dolph Ziggler vs. Kevin Owens
-WWE Universal championship/Tables match: Seth Rollins vs. Baron Corbin
-Two-on-One Handicap match: Roman Reigns vs. Shane McMahon and Drew McIntyre
-AJ Styles vs. ???
So in essence, three rematches from Stomping Grounds, however modified (Kingston/Ziggler, Rollins/Corbin, Reigns/McIntyre), are advertised.
Curiously, Reigns is already slated to face McMahon and McIntyre in a handicap match on Raw tonight, per a decree from McMahon at Stomping Grounds on Sunday.
It's not clear if Styles' opponent is a mystery opponent, or whether his name simply hasn't been given to the venue for their advertising.