2019 was a huge year for the X-Men comic book line. Superstar writer Jonathan Hickman made his long-awaited return to Marvel to take the reins of the X-books and build a bold new status quo for mutantkind. That process began in the twin titles House of X and Powers of X, which established a new mutant nation on the island of Krakoa and revealed Moira MacTaggert to be the most important mutant in history.