$10 says AAA.
“EXCLUSIVE: WWE has established alliances in Japan, the United Kingdom and the United States with top professional wrestling companies. Lucha Libre Online can confirm that WWE is looking to establish alliances or agreements with companies in both Puerto Rico and Mexico. The company has knocked on the door in both countries very recently with the intention of creating a partnership, similar to what they did with companies like TNA, Pro Wrestling Noah and MariGold. If it comes to fruition, it would be HUGE for the company from Puerto Rico and Mexico that WWE selects.”
My money says NJPW dates
That would be sick, and a likely outcome