6) Four Horsemen
A very long list of mutants have been Apocalypse’s Four Horsemen over the years, leaving Bryan Singer with a number of different options. However, the foursome he’s put together for the film is fantastic, with Magneto, Angel, Psylocke, and Storm making for a very unique team to put alongside the ancient villain.
While it was initially thought that Apocalypse controls them, that doesn’t appear to be the case here, and the glimpses we get of them in action are pretty exciting. Oddly, Psylocke doesn’t really get the spotlight here, but seeing as her power require a lot of special effects, it could be that they’re saving her for the next trailer.