Producers for GI Joe said they weren't screening for critics because they want the public to decide its fate, noting that Transformers 2 (same producers) got horrible reviews and raked in the money hand over fist. They specifically said they're pretty sure the movie can be successful without the critics' blessing.
On a completely different note, I rented AVP Requiem last night, solely based on some people here saying this was the AVP movie that should have been made. You people owe me $5.45 for my Blockbuster rental. I'll be PMing you on payment details through Paypal.