7) Bacta Tube
Another first for Darth Vader in Rogue One occurs when we learn that he spends his free time recuperating in a tube of fluids in an attempt to heal his extensive wounds. If said tube looks familiar, that’s because Vader’s own son Luke previously used one that looked very much like it to heal his own injuries.
Back in The Empire Strikes Back, Luke is attacked by a wampa on Hoth and is put in a Bacta tank, which completely heals his abrasions. Clearly, taking a bath in lava is harder to heal than Luke’s ordeal so Vader’s Bacta tank probably only acts as an ongoing treatment rather than an instant cure.
When he gets out of the tank, we see him don his iconic helmet, cape and armour for the first time in the movie. Proving the incredible attention to detail that this film has, hardcore fans of Vader will notice that his suit here is modelled after the slightly duller model from A New Hope that possesses different dimensions from the model used in the later two original trilogy movies.