The extended edition will change nothing. The GA won't see it. I won't even see it.
It's like the Mandarin in IM3. Does the GA know that he wasn't the real one and that he's still out there? No, cause they didn't say so in the movie. It was talked about in a one shot marvel did for the internet.
If it's not in the movie while in the theater, the vast majority of the population won't know about it.