Harvey Weinstein offered a peek at Quentin Tarantino’s “The Hateful Eight” at the Cannes Film Festival, where he previewed the Weinstein Co.’s upcoming slate. The annual presentation to media and industry members featured a handful of films that will premiere at Cannes, but probably the most anticipated, previously unseen film among the Weinstein Co.’s offerings was a two-minute trailer of Tarantino’s latest. In the footage shown, the snowy Western evoked Tarantino’s “Reservoir Dogs” in its gathering of a group of tough characters. It also was shot in 70mm.