So was listening to The OverView podcast, and in episode #42, Flame (who's close to the players on the scene, and I think was MLG Vegas in this first time role as a caster) said that C9 was already trialing Gods to see who he could replace. And it seemed like they got the best results when he took over Kyky's spot.

So the team was already planning on bringing Gods in, and it was easier for KyKy to coach for another group rather than his old team (imagine when one of your co-workers gets to promoted to manage his former colleagues who were on the same level previously). That and Kyky was already friends with Internethulk from before.

If you're looking for competitive news, there are lots of informative overwatch podcasts out there, but The OverView seems to have a better insights on the scene.