You may remember the picture of the Predalien maquette (seen below) that was circulated online earlier this year.
It was rumoured to have been sent to ADI when AvPR was in pre-production. Though that was true, it was never sent with the intent to design the creature. Even so, a lot of fans actually preferred this design to the version ADI made. Staff member Xenomorphine managed to interview the person who created the maquette, Shaun Noelte. Check out his excellent Interview about the maquette which has lots of pictures too.