It's easy to forget how game-changing the arrival of X-Men was back in the year 2000. Almost a decade before the Marvel Cinematic Universe began its vice-like grip on the box office, this ragtag bunch of mutants re-ignited the lagging superhero genre and paved the way for the revival of the public's interest in such cinematic fare. Over the last 19 years, the X-Men franchise has seen some incredible highs (X2: X-Men United, Logan) and some guttural lows (X-Men Origins: Wolverine, X-Men: Apocalypse). Sadly, they've saved their worst...