#3 Both are two of the biggest stars in NXT

WWE needed two big names for a big single’s match for WarGames. Since the traditional WarGames match will already consist of the NXT Champion, the North American Champion, the NXT Tag Team Champions, and Ciampa, Lee, and Dijakovic, it was sensible of them to bring Finn Balor back to NXT and book him in a feud with Johnny Gargano right away.
The women of NXT will also feature in a WarGames match at the event for the first time, and this left way too few top Superstars to have a huge singles match for the event for fans to look forward to.
Balor’s booking with Gargano would have been perfect, but his injury left a big hole on the entire plan that the company had built. Riddle is also one of the biggest stars NXT has got and is currently not in pursuit of any Championship.
Therefore, him going after Balor makes sense since the booking seems to be as massive as the one between Balor and Gargano, and Riddle could draw in the babyface reactions from the crowd as well as the company would have expected from Gargano.
Major rumor about recently released stars HERE