Allies and Enemies in the Future

I've heard plenty of talk about possible crossovers with Godzilla and other franchises (Pacific Rim being the most common). But I've also heard a lot of talk about the return of some of the old monsters. I know it's early to start thinking about sequels, but here's what I want to know: What is it you want to see most in the future? On a personal level, I'm happy with the dark tone that they are taking with the new movie, but I would really like to see some of the old monsters make a come back. Particularly some of Godzilla's oldest comrades, like Anguirus, Mothra and Rodan. As well as some of his classic enemies. But, what do you think? What is your dream for the best possible future of Big G?