three months is average for a hollywood movie, so there's a slim chance it won't be all green screen, but since it's shooting in toronto, there's every chance it will look like every planet Sg-1 has ever investigated.
Besides, since it's a prequel, the burned up camp set probably won't be much use to them.
and, just for kicks...
The Thing, itself was a REMAKE. It also took 3 months to shoot and it DID shoot on sound stages, six of them. So, by our strict "remakes suck! sound stages suck!" rules, The Thing, sucked.