Well this is just bizarre. Edgar Wright has been writing this movie longer than he's been alive. He started it back in the 60s. Surely Marvel should have known for a while that his creative vision would be different from theirs? Maybe Wright was insistent on not incorporating it properly into the MCU?
But maybe this could be a blessing in disguise. It was always Wright who has prevented Hank Pym from joining the MCU properly, and Feige has adhered to his vision all along. I wouldn't be upset if Michael Douglas also decided to leave the project, and Marvel recast Hank as a younger guy who is the same age as the rest of the Marvel actors. Maybe they could even make Rudd play Pym now?
In fact, it seems like Wright's movie should always have been a sequel or even a reboot, while the first movie should have concentrated on Pym. It's probably too late now to rewrite the script to make it about Pym, but they could always recast, unless of course they decided to delay the movie until 2016. But then, would they even make the movie now without Wright?
It almost seems as if Marvel has put all their eggs in one basket with Wright regarding this movie. It has all depended on him actually being part of this production, and not that they necessarily wanted to make this movie all along and just happened to find a suitable director. If they did want to make it, they could have done so years earlier, or even last year so that Pym could be in A:AOU. Instead, they had to wait for Wright, who isn't even part of this now anyway.