So I just finished Age of Ultron 10... did a flash point just occur? Because that's kind of what I got out of it...
Maybe? All of this seems really big and chaotic, much like Flashpoint was during its miniseries, but I suspect that we will get more detail about the future of the Marvel universe. When Flashpoint ended and the New 52 happened, I think it was very messy and there wasn't enough communication between readers and DC about the details of the new world, especially how the New 52 came to be. Post-AoU seems to be something that will shape up slowly, hopefully with more logical things and known details. Nearly two years into the New 52, and Trinity War is maybe sorta kinda going to show us what really happened. I think Marvel won't make that same mistake.
I think Infinity, the summer event, will explore the effects of space and time being broken, which is to say that AoU might have existed simply so that they had a reason to break space and time. I'm annoyed by that theory because it means that Marvel's writing team has gotten lazy, but the outcome could still be really cool.
All of this to say, if AoU is an equivalent to Flashpoint, it pretty much wasn't in response to the New 52. Marvel would be insane to think the sort of messy continuity DC has created is what readers want.
Like... DC Flashpoint?
Yeah basically in AoU 10 they managed to beat Ultron using a time travel plot, but once they beat him they had manipulated time so much that time broke. It even had an effect on alternate realities like Ultimate Comics.
Well, I will admit they look similar.
But I highly, HIGHLY doubt Marvel will go that route seeing as how many reacted negatively to DC's reboot. As someone above said, it's more likely a "Retcon Punch" Or a way for Marvel to set up the NEXT event.