Veteran crewmembers who have toiled on director Alejandro G. Inarritu’s The Revenant say the director’s follow-up to Birdman could turn out to be epic and Oscar-worthy. Some also say that making the film has been by far the worst experience of their careers — “a living hell,” as one bluntly puts it. Starring Leonardo DiCaprio as early 19th century explorer Hugh Glass, Revenant went into production in September and was supposed to wrap in March. But cameras still will be rolling into August as the budget has climbed well past $95 million, with insiders predicting it will reach or exceed $135 million. Crewmembers say they have seen huge turnover, including many who were fired and others who quit. They say the behind-the-scenes drama led Inarritu to bar producer Jim Skotchdopole, who worked with him on Birdman, from the set.