If you want to get my attention a 14 foot tall Mech suit will do the trick.  This prop piece was on display at Comic-Con International in San Diego this year.

Avatar is a James Cameron 3D science fiction film due out on December 18, 2009.

The Story: On a small moon called Pandora during the 22nd century a paralyzed Marine named Jake Sully volunteers to exist as an Avatar on Pandora due to the hostile atmosphere.  The avatar is a human/Na'vi hybrid.  The Na'vi are ten foot tall, blue humanoids that are peaceful inhabitants of the moon unless attacked.  Jake falling in love with a Na'vi princess and becomes caught up in the conflict between her people and the human military that is consuming their world.

(via MTV Movies Blog)