So if you were wondering if this is worth getting, the answer is — unless you’re a fanatic collector of the MCU tie-in comics — no. It really doesn’t present much new material: I counted eight pages of new stuff, if we’re being generous. The rest was either recaps of the movies (which, if you’re enough of a fan to be grabbing the tie-in comics, you’ve probably seen) or excerpts from the original Civil War comics. And sure, that might prepare you for the film, I guess, but so would rewatching the movies so far. The movie adaptation (which I have now seen) is different enough from the original comic that it’s not at all necessary to read the comic as a companion.
So there you go. Save your money.