
Leonard Norman Wein (/wiːn/; June 12, 1948 – September 10, 2017) was an American comic book writer and editor best known for co-creating DC Comics' Swamp Thing and Marvel Comics' Wolverine, and for helping revive the Marvel superhero team the X-Men (including the co-creation of Nightcrawler, Storm, and Colossus). Additionally, he was the editor of Alan Moore and Dave Gibbons' influential DC miniseries Watchmen.
Wein was inducted into the Will Eisner Comic Book Hall of Fame in 2008.
Description above from the Wikipedia article Len Wein, licensed under CC-BY-SA, full list of contributors on Wikipedia.

X-Men: Days of Future Past
2014 · as Congresman Davis

Mutant vs. Machine - The Making of 'X-Men: Days of Future Past'
2015 · as Self

Marvel: 75 Years, from Pulp to Pop!
2014 · as Self

Secret Origin: The Story of DC Comics
2010 · as Self

Batman Unmasked: The Psychology of The Dark Knight
2008 · as Self

The Wolverine: Path of a Ronin
2013 · as Self

Savageland
2015 · as Len Matheson

Batman Tech
2008 · as Self

Story Within a Story: The Books of Watchmen
2009

Chris Claremont's X-Men
2018 · as Self

Robin: The Story of Dick Grayson
2010 · as Self

The Phenomenon: The Comic That Changed Comics
2009

Jack Kirby: Story Teller
2007 · as Self

Tales of Frankenstein
2018 · as Helmut Frankenstein

The Roots of Wolverine: A Conversation with Stan Lee and Len Wein
2009 · as Self

Heart of Vengeance: Returning Batman to His Roots
2011