Well, my opinion!
i say marvel is guilty!
- They announced their inclusion way too soon, which is strange (probably they would know about Singer intentions).
- And Singer cant cast someone in 2 days for the part. There was always intentions to use it, and they took time to cast someone to get it right, and i think Quicksilver actor has the perfect look.
- And probably he was planning to use Magneto children in a alternate future, where we see what happens with certain Magneto decisions. Singer is always saying there are several time lines and futures, not just an alternative one.
And i would love to see S.Witch
They're guilty of nothing. Whedon announced it, not Marvel, because he was excited at including him and since he is a bit of a fanboy at heart, he couldn't keep it to himself. So drop this one sided attack on them.
And there were weeks between the initial Whedon announcement, and this recent casting, not two days, so stop exaggerating. Plenty of time to work in an action sequence, which is the only bit we've got confirmed for him, and cast the role.
Renner had a cameo on Thor.
But at the end of the day, A1 was that, the first movie. All the studios keep the new characters of the sequels under wraps until one year before the movie or so, some months before filming starts.
Not two years.
Which was added in post production, not done during initial filming, and was widely reported as such.
And please stop saying this is not how it's done because you clearly don't know that. Characters get announced at all sorts of time intervals in pre-production, from years to months. Malekith was announced relatively early. Falcon was definitely announced early. What is strange is an 11th hour casting when a movie's main production is already underway.
And it's funny too. Because all I've read the past few days is FOX is so mean and evil for their deal with Marvel. I didn't hear anyone complaining back in 2000 when X-Men hit the big screen and was a hit.
It seemed to be people were pleased with FOX and Marvel for giving us an awesome big screen adaptation. Now it's "damn you FOX. You're so evil for wanting to use the characters you paid for."
Not many want to acknowledge that because of FOX and Marvel's deal, it allowed Marvel to form their own studio.
They were excited then because it was the first anyone had seen of its kind, and many will admit there were some blinders on because of that.
And it's more "damn you fox for treating your franchise like a cash cow with little respect". You have nowhere to look other than The Last Stand for proof of that. And after the long lasting negative reputation of that film, and the less than expected performance of First Class, they were very likely getting worried, so as has been widely theorized, they wanted to pull out all the stops to get the money maker back on track, bringing Singer back, bringing much of the original cast back, trying a bigger scale story, etc. So it's not beyond reason that they'd try something to get their hooks into a bigger money maker as well, ie Avengers and their recent news. FOX's negative ways of running things have been noted many times before, this is nothing new.