I wouldn't have a problem with them pushing the film back to a late fall/early winter release.After a decade of delays,a few more months shouldn't make a heck of a difference.
But script revisions happen all the time.Sometimes during shooting.It's not always the drama people are making it out to be.
Small script revisions happen during screaming. Aging down or depowering the mentor of your legacy character is by no means a small revision. And Marvel seems to have a problem with pushing it back so... -shrug-
Again people are acting as if a costumed crime fighter that can shrink (and grow) at will is old hat.Correct me if I'm wrong,but the last time the shrinking concept was even attempted was Honey,I shrunk the kids,back in the late 80's.There really doesn't need to be this drastic sales pitch to legitimize the movie.If people will go to see GotG,Ant Man should be,by comparison,a safe bet.
I think people expect multiple new things, like GotG brings, as opposed to one unique thing, which the typical-superhero-movie-Pym would bring to the table.
Well,since "He was young and an Avenger in the comics" and "I like Pym better and think his story deserves to be told from the beginning." isn't justifiable reasons for you and Question,I'll refrain from answering.
If they're justifiable, just justify them. Case in point: there are other changes from the comics that you do accept. So why is this change one that you won't? What's the justification?
Why is not telling a story in chronological order a disservice? Is 'En Media Res' only for poor stories, in your understanding?
When I saw this image, I laughed really hard. 75 years of Marvel (brought to you by the TALENTED Greg Lang) and only movie characters, with the exception of Carol Danvers who is being shoved down everyone's throat, Sam Alexander, Black Bolt and Spider-Man which I suppose it would be a crime not including him. Not even their first family made the cut.

After Original Sin, they will release several new titles, including one for Deathlok. It's safe to assume Lang will get one due to his movie coming out the next year. That's what I wanted for Pym. And as they said before, ''movies should influence comic books'', so will they make Pym old in the comics just so it mirrors the movie version? No, of course we don't know. But then again, nobody here knows anything, as this is pure discussion and speculation.
I want to see Pym's origins as a young man, interacting with other current Avengers and being ''relevant''. To those who are fine with old Pym and Wright's vision, let's put that aside for a moment and answer, do you want to see Pym being a young (30-40+) costumed superhero interacting with the Avengers? If you say no, why? Do you honestly know the character? He's not just a wifebeater or Ultron's daddy. There's more than that and it's quite simple. I don't mind seeing Lang taking the mantle, as it's clear he's been Ant-Man for longer, and if Wright really left Marvel because they wanted to include as many MCU references as possible, then I don't really know what to think about Marvel's revised script. I don't dislike the character, because I don't know him that much and I'm open to his inclusion in the MCU. So I repeat,
To those who are fine with old Pym and Wright's vision, let's put that aside for a moment and answer, do you want to see Pym being a young (30-40+) costumed superhero interacting with the Avengers? If you say no, why? Do you honestly know the character? Do you really think his main appeal is being Ultron's dad? Would you be ok if something drastic happens to the current MCU Avengers for the sake of someone else's vision, granted, it's ''better'' than going by a more ''faithful'' adaptation?
So it's not about age or quality of the movie, none of that's your main concern, you just want an editorial push for Hank Pym? The comics, and no the films are your priority? Did I get that right?
Why is age "drastic?" I think that's close to the core of the issue. Certain changes: costume/clothing, speaking patterns, personality shifts, scientific properties are not considered drastic changes, but certain other traits: race, and apparently age are called "drastic?" Why is that?
To answer your question, I think several long paragraphs have been written about "why not," much better than I could write. But, the reality is that I do want to see young Hank Pym suit up alongside the Avengers and interact with them. I would enjoy that. But what I'd like more is an awesome Ant-Man movie that everyone likes and isn't dismissed as derivative. What I'd like more is a relevant Ant-Man. And if that means changing his costume, his hairstyle, hair color, occupation, height, weight, age, race, gender, religion, species, as long as the nature of who the character is intact and the story is enhanced in some way, then that's what I prefer. Why would I want a poorer film just so it can look like the comics? And we all agree on this concept, but certain properties, in this case, age, are mysterious unincluded.
I know it seems like a young Ant-Man would be more relevant, but he has almost nothing to contribute to the Avengers. He's not a founder/Ultron's daddy and he's not the guy who is too pacifist/self doubtful/haunted by mistakes to separate himself from the Avengers. He's just another scientist with superstrength, but he can shrink to sneak around instead of just sneak around the old fashioned way like Widow and Cap. But he's in the room standing around, waiting to do the only thing unique to him: shrink down and jump in someone's ear. He's there, but no one has history with him, which, at the end of the day, isn't actually a faithful interpretation at all. He's irrelevant. If he's not there, nothing changes.
But an older Pym, whose already had his time, whose already made his mistakes, he can school the Avengers on how things are done, be revealed as someone behind some of their troubles when he meets them. He can be the guy who is in search of redemption, just like young Pym was in the comics. He can be the guy with a long list of failures who gives up superhero life. He can be the guy who lost Jan. He can be the guy who He can be a faithful and adaptation of the character's nature, and not just the character's affiliation and age demographic. He can be relevant, to the universe and to the general audience.
And him receiving the same comics push that Rhodey got (a solo comic) wouldn't hurt either.