Not sure if you missed it but the article does say that the hub would once again be MKE.

And of course, like no1cub17 said the chances of getting a hub at OKC are slim to none. Considering what we're getting though in recent months, I'd say we're doing quite well. If we do break the 4 million mark this year, that will bode even better for future increases in flights and destinations. A hub is very unlikely though.