We’re around six weeks away from the 83rd Venice Film Festival lineup reveal, and some titles are starting to emerge as contenders. Variety’s Nick Vivarelli and Elsa Keslassy have the goods in their just-published spitballing report.They are all but confirming Florian Zeller’s “Bunker,” starring Javier Bardem and Penélope Cruz; Martin McDonagh’s “Wild Horse Nine,” Werner Herzog’s “Bucking Fastard,” Nanni Moretti’s “It Will Happen Tonight,” and A…