Clash of the Titans WIP II

It seems this picture wants to be finished. It doesn't want me to work on any commissions...so I've been working on this aaaall day today. For like... six hours? My eyes are burning.

I changed a few things around, like the way the scales look on the T-Rex's spine. I haven't done much with the V-Rex (which I found out means Vastatosaurus Rex) except re-draw the T-Rex's leg and have it slashing through the V-Rex's chest. Besides that I don't think anything has changed.

Any ideas on the background? I'm thinking forest and mountains, like from King Kong.

Time so far: 18 hours.

Thanks for looking!