So, what are you guy's predictions? How are the X-Men or mutants for that matter going to make it into the MCU?
An off-the-wall idea I have after watching Falcon and the Winter Soldier is using the displaced people that remained on earth during the snap. With people/ animals decreasing by 50% all over the world - borders were basically abolished. Countries and territories welcomed new residents to help rebuild. When half the planet's population returned - most of those people that had built new lives for themselves were displaced and placed into refugee camps, and quarters, not unlike ghettos. As we've seen in the show - they aren't pleased and that sentiment grew into the Flag Smashers.
Now, I'm still holding onto the possibility of the MCU continuing to borrow from Marvel Universe 1610 (the Ultimate Universe). In that universe, the x-gene was artificial, developed from experiments on Logan (patient zero). A sort of retro-virus was created and it spread like a disease infecting people and rewriting their DNA. In Falcon and the Winter Soldier, we learned that diseases spread rapidly in these camps due to poor conditions. What if someone deliberately or mistakenly infects people with a retrovirus? By having people from all over the world mixed into these camps - it would ensure that mutants are, for the most part, equally dispersed and not concentrated in one area - thus mimicking natural global proliferation.
Those infected wouldn't just have to deal with their new condition but also have a built-in distrust of "outsiders" and already dealing with feelings of disenfranchisement. It'd most likely fast-track "villains" and groups like the "Brotherhood" created by people who were without power - now having it. I also noticed an "X" on one of the gates of the GRC compounds. If it's used enough throughout the camps - I could see it co-opted by them as a reminder of where they came from as opposed to being Xavier's name or for the "X-gene", which may not even be called that.
Then there's always the Multiverse of Madness just scrambling everything up... Not as lazy as saying "they were always here" - but still pretty lazy.
What are your thoughts?