Re: Diva Battle Royal on Main Event was a joke!
If you are being positive, it might be because they intend to use Summer as a wrestler in future.
There's that, and then there's Summer filming Marine 4 right now. Had to write her off somehow. She'll feud with Layla upon return I'd wager, then probably move on to bigger and better things. It's actually working out quite well for everyone involved, because Summer was outshining Dango, which really isn't that much of an issue with Layla, + Layla gets to reinvigurate her Lay Cool Persona as the heel sidekick.