After working to make this match happen for a couple of months, NJPW sent Jericho his first offer and it was so low that Jericho almost shut down the entire thing. It was an insulting offer, and they had some serious work to do to repair the situation. Eventually they managed to get the deal done and then he just had to call McMahon.

Jericho informs that his call with McMahon was not long, and after explaining the situation to McMahon he said, “You have to do it”. McMahon thought it would be great for Jericho, and great for him and WWE as well. McMahon told Jericho that everyone knows he’s a WWE guy and he’ll be flying the WWE flag in Japan.
After finally speaking with McMahon about it and getting his approval, Jericho began to plan out the entire angle. He got his friend to sent out the initial tweet which sparked the entire Twitter war, after Jericho replied to it saying that Omega wasn’t even the best wrestler from Winnipeg, let alone the World. From there the angle heated up and now they’re just hours away from settling things in the ring.