It's really up to WWE to make this channel. Contact them and let them know you're interested!
OR for Roku to go to WWE and say we have X number of viewers who could contribute Y dollars per month....
Roku has no way of knowing what that X number is. Lots of individuals contacting the content owner and telling them you want to give them money is how you get them interested.
No, I don't work for Roku.
Netflix Player N1000X, XDS 2100X (premature death by lightning)
Roku2 XD 3050X, Roku2 XS 3100R, Roku2 4210R