Before agreeing that one book has passed another I'd need to see a trend, not just a few sales.
That's one of the problems with the internet and GPA data, people don't have the patience to see where the chips are actually falling. They just assume every new data point is the new value.
Again, remember you couldn't give away an All Star #8 or a More Fun #73 just a couple of years ago. This movie craze has no real logic to it.
But again, I'd need to see a trend of several books in several grades before coming to a final conclusion.
And as far as the Hulk #1 / AF #15 discussion that happened a few months ago on here, did Hulk #1 surpass AF #15? No, AF #15 just pushed up higher.
In my opinion that same thing will happen if SC #4 continues to heat up - it won't surpass other books it will just push them up.
Personally, I'm not a fan of all this movie hype.
Oh, and for disclosure I don't own any of these books being discussed at the moment.