Great question — answering as the UphillTech team:
No, it is not related. Well.... it is set in the same Universe as the other Marvel movies. But, apart from a couple of brief mentions, nothing that happens in the film relates to the any of the others. The film is a self-contained story, and you will be able to watch it without knowing anything about the other Marvel films or comics. That said, it is part of the story leading up to Avengers: Infinity War, so if you're planning to see Infinity War, include this one.
Full answer by Tim: https://movies.stackexchange.com/a/71234 (CC BY-SA 3.0).
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