The Fox series has always been grounded in serious realism. Like, "this is how it would be if they existed in the real world". I blame a lot of that on Blade. That movie proved you can take fantastical material and translate to something more gritty and real. It helped in a lot of ways, but it also made studios stick to that format and made them afraid to try something new. That is, until Marvel mated with Disney and birthed the MCU. Now that's proven that you can indeed get pretty crazy and still turn a profit, I think Fox should take the chance and start venturing into the more insane parts of X-Men lore, that being space. With that said, how do you think they should expose the X-Men to otherworldly threats? Or perhaps, not all? Here are some avenues;
The Phoenix Force
The Shi’Ar Empire
The Brood
The Phalanx
Each has its upside and downside, and some can be merged with others, most likely and obviously, the Phoenix Force and Shi’Ar Empire can occur simultaneously or as a result of the other. The only really issues with the other two are their similarities to each other and to other known franchises that they may or not have been inspired by (the Brood are very similar to the Xenomorphs of the ‘Aliens’ franchise and the Phalanx have a very ‘Borg’ like motivation from Star Trek). Then there other options like alternate realities and dimensions.
So given the opportunity, how would you approach the idea of extraterrestrials in the X-Men movie franchise?