I think it stem's from Khan not seeing other feds as competition but as chance to cross promote and grow. He doesn't view WWE as the only game in town. That is fairly well known.
That is why I am ... I dunno ... not sold on a the idea of the merger.
Cross-promotion and elevating wrestling as whole is one thing ... merging doesn't sound like a good idea IMHO.
This is all rumor and spitballing. I do, however, fully believe the first half of that rumor (the waiting to sell, building a team, etc).