What could fight Godzilla?

We all know about the monsters from monster island, but that is near Japan. Just exactly what could attack Godzilla in a America. I'm thinking it is something from space, or man made. I do think Godzilla will fight something. It just wouldn't be him without a good battle. The thing is most likely new to Godzilla. Just exactly where or what is the thing Godzilla will have to battle in 2014 ? What do you think?