“Welcome to Marwen” – It’s difficult to remember a film that featured as many toy army action figure sequences as “Welcome to Marwen”. The little green army men from the “Toy Story” series come to mind, but the plastic troops, led by the voice of R. Lee Ermey, were just supporting players. In co-writer/director Robert Zemeckis’ new movie, a small group of 12-inch fabrications occupy, perhaps, fifty percent of a very, very long 1-hour 56-minute runtime. The picture begins with an engaging animated World War II aerial scenario over Belgium,…