10 NXT Men
As with the NXT women, there are loads of possibilities regarding which men from the yellow and black brand might show up. In the past, Adam Cole, Johnny Gargano, Aleister Black and Pete Dunne have all competed in the match while still members of NXT. I don't think Gargano or Cole will take part this year because they are both engulfed in top storylines in NXT. If they show up again it would almost necessitate a move to either RAW or SmackDown.
A lot of men recently made marks during the build to Survivor Series. Matt Riddle, Walter, Damian Priest and Keith Lee were all a part of the NXT Men's team at the PPV. I would expect all four of those men to be in the match as representatives of NXT/NXT UK.
Corey Graves deleted his Tweet! More details HERE.
Velveteen Dream would also be a shock return due to being out of action for a few months. His injury is to his back and back injuries are hard to figure out regarding return time table. He also has unfinished business with the Undisputed Era since they "put" him on the shelf. If he's cleared for action, he'd be a great pick to be in the Rumble.
Dominik Dijakovic was left off of the NXT team after helping Team Ciampa win at TakeOver: WarGames 2. He should get his chance in the battle royale. Another strange possibility would be if Finn Balor shows up as a representative of his new brand.
10 NXT entrants: Walter, Lee, Priest, Riddle, Dijakovic, Dunne, Tyler Bate, Isaiah "Swerve" Scott, Kushida, Killian Dain