Sources tell us the next trailer for Lionsgate's Saw V is due within the next two weeks. Definitely before October. You can currently see the teaser which made its premiere at Comic-Con in July via this link along with all of the posters released to date.
Over at camp Twilight, the vampire drama based on Stephenie Meyer's novel, we've been informed a proper trailer is due in mid-October. When we pressed for more details on the possible film it will be attached to, our informant clammed up.