It's the life cycle of movie or TV related over hyped books which are actually common in all grades across the board.
And it's a life cycle that we have seen rinsed and repeated on a countless number of these types of books, without any notable exceptions at all.
The real question is, why do you believe it will be any different for IM 55?
I'm just going to quote this and throwing these numbers out there on 2/1/2017. The 90 day average on GPA for a:
9.8 is 6,001
9.6 is 2,711
9.4 is 1,837
9.2 is 1,381
Between those grades we're talking over five hundred books. I'm just posting this because in my opinion this book still has room to grow. The way marvel writes Thanos is amazing. I will read stuff just because Thanos is involved. Thanos Rising actually got me into reading some new books again. I figure he still has a big movie bump coming and yes the book will settle after that but that's why I listed the GPA data because after a good movie bump these prices may seem like a deal even after the dust settles. Only time will tell.