Marvel has a long history of tie-in comics related to the films, and sometimes they're pretty essential reading. The Doctor Strange Prelude comics, for example, really fleshed out the mystical corner of the MCU - including giving us the backstory of Kaecilius, the villain. Unfortunately, though, this year's preludes have seemed to be surprisingly tame. The Guardians of the Galaxy Vol. 2 Prelude was nothing more than a comic book version of the first film, and the Spider-Man: Homecoming Prelude is more of the same.
The X-Men's "ResurrXion" looks set to take a literal direction, with the Marvel's May 2017 solicitations revealing the resurrection of none other than Wolverine.
More than most Rebirth one-shots, this is essentially a beautiful advertisement for the ongoing Batwoman series. It features a few tantalizing hints, but is otherwise just a gorgeous character-profile.
In the aftermath of 2015's Secret Wars, Marvel launched the X-Men in a controversial new direction. We learned that the Terrigen Mists circulating the globe had become poisonous to mutants; as a result, both the X-Men and the Inhumans were faced with a terrible problem. If the Terrigen Mists continued to spread, then the mutant race would become extinct; if the Terrigen was destroyed, then the Inhuman race would become extinct.