5. Additional Superhumans Being Hunted
Even if it's just a quick glimpse or a few cameos, it would be nice (I use that term loosely) to see a number of non-mutant super-powered individuals being hunted - for the purposes of Easter eggs if nothing else! In the comic book arc, having already conquered North America, the Sentinels turn their attention to mutants and other superhumans worldwide, so there's no reason why clips of attacks from around the world can't be shown - and if that means putting recognisable superheroes on screen getting killed by the giant robots, all the better! Imagine a scene in England with Captain Britain falling, or a scene in China with Radioactive Man meeting his demise, or a scene in Pakistan in which Faiza Hussain is slain - it would be fantastic to see a montage of the destruction of super-powered beings all over the world at the hands of the Sentinels. Essentially, it would just be nice to see the X-Men movies branching out and showing the viewers that there are more than just mutants in existence in their world when it comes to super-powered heroes and villains - and this is the ideal opportunity to do exactly that. And it could be done using characters who are in no way associated with the X-Men or any other existing or planned movies, by having the Sentinels killing off completely dispensable characters for nothing more than the purposes of neat references.