I think this was the plot:
The avengers have kids (modified/created in a lab kind of thing)
(And I think Tony had a kid with Steve....)
And then all the avengers are put in some sort of modified sleep, except for Tony, but he thinks they are all dead. And then Tony goes to a place in the middle of nowhere (I think he ran for a supervillain (might be Loki)) with all the kids and raises them.
And he tells all the kids great stories about their parents. But not about himself.
And then I think the kids & Tony defeat the villain and find out the avengers aren't actually dead but in a sort of sleep.
And they wake up & fluff & angst & stuff
That's basically all... I hope someone can help me out :)