Well Namor if I'm not mistaken can't even get his own film without Universal distributing it, so there's that. So their solution - if rumours are true, he would be a Black Panther supporting character in his first mcu appearance.
And Is Namor similar to the X-Men that needed to be in phase 1 if Marvel Studios had all the rights in the beginning? No right, thats why he's being introduced in phase 4.
Whether he's getting a movie or not has absolutely nothing to do with anything. The point is that Marvel Comics was publishing superhero stories for decades before they introduced the X-men. Those stories are still considered part of the history of the marvel comics universe and yet mutants, the audience eventually found out, had *always* been part of that universe, despite the public never knowing they existed until shortly before the X-men debuted. Those stories have never been a problem for the comics and I've never once heard an X-Men fan complain about the fact that mutants existed for most of history but were only publicly known halfway through the 20th century. (Later, really, considering Marvel's sliding time scale.)
Ant-man and various others aren't a specie like mutants and we saw the origin story of Scott Lang and they had flashbacks for the original Ant-Man. The ones like Eternals have been in the beginning of the timeline and we know how they kept their identity so long.
For the mutants, unless they've been brainwashed in everybody's head. I don't buy mutants around the world, without any association to the X-Men, have all managed to be under the radar this long.
First of all, they will have flashbacks for historical mutants. You can pretty much consider that guaranteed.
Secondly, there is *no* 'so long' here. Historical mutants could be all over the history books in the form of mythological characters, local legends, old stories, etc. The point here is nothing more than that nobody in centuries past would've ever heard the word 'mutant' and nobody in the modern era would take old stories about ancient and powerful beings seriously. Because we automatically view old stories as made-up or at the very least heavily embellished.
The only time period where there would be a genuine possibility of things coming out is over the few decades of time we've actually followed in the MCU because people are more open to the possibility of strange beings existing and the quality of evidence is high enough that no one can poo poo their existence as a hoax. But as I already said, that also gives an automatic cover to any random mutant who shows off their powers because the public is already conditioned to see super-powers as a thing which some people just have, not a sign of a coming Homo Superior subspecies.
And thirdly, Mutants aren't an 'entire species', they're humans with an x-gene. Which means they *don't* have to maintain a purely mutant population to exist. It's entirely possible there've only been a hundred or so mutants scattered throughout the reaches of human history, only a few hundred more by Xavier's generation. (IIRC, in the comics the entire mutant population on the planet was supposed to be somewhere in the low thousands before the late 90s mutant boom, and that's a couple of generations after Xavier.)
Compare that to the 7 billion regular people on the planet today, apparently hundreds of which are already known to have powers of some kind or other from all sorts of different sources. Take into account the fact that a significant number of mutant powers are fundamentally hard to notice, that some mutant powers are so dangerous they could easily lead to accidental suicide, and that other mutant powers are so dangerous they can easily do what they like without leaving witnesses. Take into account that many mutants have no powers at all, just physical deformities that make them outcasts and heavily motivate them to live in hiding. And add on top of that the fact that almost all of the actual specific characters I can think of who are older than Xavier's generation have always been portrayed as people who chose to exist in the shadows 90% of the time, anyway.
It would not be strange to me at all that only a handful (a few dozen at most) out of several hundred mutants is actually in any way known as having powers, and all of them can easily be brought under the umbrella of 'people the public thinks are just the same kind of super-people as all the other super-people' or 'secret operatives working for organizations like SHIELD and HYDRA that the public doesn't know about'. Especially since many, maybe most of them wouldn't even know *themselves* what a mutant is or that they are one. Because not every mutant has the intellect of Xavier and Magneto, so they won't know what a mutant is until someone tells them, just like everyone else.
