Any water battles between monsters

Yes, because Godzilla is a creture that lives in the water-(or at least every other movie)-and it would be wierd if the movie didn't.

I dont know, but it would be an interesting spectacle to watch.

Since his enemies are supposedly buglike I doubt there would be especially since the bigger 1 is supposedly winged. 

I don't think there'll be any monster-monster fights in water environments..but with humans, likely. Plus, with a really possible sequel, they could reserve epic monster water battles for that.