Here is one of a number of shots that seems to have been lifted pretty faithfully from The Crab With The Golden Claws. Following that plane crash we’ve already seen, Tintin, Haddock and Snowy have to make their way across the Sahara desert to food, water and (in Haddock’s case) alcohol. Golden Claws, incidentally, is a sort of origin story for Tintin and Haddock, explaining how they met in the first place. The Secret of the Unicorn and Red Rackham's Treasure are a matched pair, covering the same story, but the jigs that we're spotting in this trailer suggest that the Macguffin in Claws (opium smuggling) might have been dropped in favour of a plot that's all about Rackham's Treasure. But that's pure guesswork at this stage.