#3 King Corbin

We're already in the era of brand-to-brand invitational matches wherein Superstars from RAW and SmackDown can make appearances on a brand they're not officially assigned to up to four times a year. And we've already seen several such crossovers, one of them involving King Corbin himself.
Now WWE loves a heel vs babyface fight and there's no heel in the company that draws the ire of the fans like King Corbin does. However, there's more reason to schedule a match between The King and Apollo Crews.
History between Corbin and Crews
Now Apollo Crews and King Corbin have crossed paths in the past. Both these Superstars feuded back in NXT in a storyline that culminated at TakeOver: London back in 2016 with Corbin picking up the win.
We all know that The King loves to gloat so this could be the angle heading into the match wherein Corbin looks down on Apollo Crews because he's beaten him already. This could set up a one-off grudge match between the two that might not advance any storylines, but would certainly showcase the incredible wrestling ability of both these Superstars.