According to Cinescape.com there were a couple of Gojira projects that never left the ground. I don't have the details, only a few of the pictures. Enjoy!

These two pix are Jan De Bont's ideas, I think. They're called "Delgadosaurus".

This is Stout's idea, whoever he is. It was for a 3-D Gojira flick, whatever that means.