Robert Eggers is already set to shoot “Werwulf” this fall, but he’s now eyeing his next film after that one. In fact, Eggers appears to be in cheery Holiday spirit this time around. Unusual. 　　Warner Bros. is collaborating with Eggers on a new adaptation of “A Christmas Carol,” with Eggers on board to write and direct the film. That’s right, Eggers is tackling Scrooge. An unusual...