on the most recent racon raider video he says that Golop is toying with the idea of having big mutants being able to reappear on other missions with the chance of getting different mutations like the chosen in Xcom 2 WFC. the big mutants would have nests in certain areas and would appear in missions that are in proximity. I know that it might not be in game but i think its still worth starting a discussion on it. the link to the video:
if snapshot does this right i will like it. but i don't want a copy of the chosen mechanic. where the chosen survive no matter what and will continue to grow stronger until you assault their stronghold. i don"t want that for Phoenix point where we will have to assault the alien nest to finally be rid of the massive monster. if we can just kill them on missions when they show up with the option to assault nest instead of needing to assault the nest i would be fine with that part.
another thing that this idea brings is that their would be a set amount of massive monsters.(i know it might not be but as i'm saying it sounds alot like the chosen from xcom 2 who only have 3.)i don't want a set amount of giant monsters that i have to kill and then their gone for good. i liked the idea their their are countless giant monsters that you might run into and they all don't have a back story to them. oh look i've lost 7 soldiers fighting that one. oh i've never meet that one. rocket to the face!! he's dead.
i know i don't know everything about this idea but this is what i know and think.