Cumming's initial foray into the superhero genre came with 2003's X2, a sequel that aimed to build upon the success of the original X-Men. However, the production wasn't without its difficulties. Speaking to ComicBook.com, Cumming described his experience on X2 as 'miserable,' citing a frustrating atmosphere and creative disagreements. He felt the character of Nightcrawler, a devout and complex figure, was underserved by the script and direction.

Years later, Marvel Studios surprised fans by including a brief appearance of Nightcrawler in 2015's Avengers: Age of Ultron during the Battle of Sokovia. While it was a blink-and-you'll-miss-it moment, Cumming found profound significance in it. He explained that the cameo offered a sense of closure and even a form of healing after the negative experience he had on X2.

“It was really lovely,” Cumming said. “It was really healing, in a way. Because X2 was a really miserable experience for me. It was just really nice to be part of something that felt so… celebratory and joyful.”

Nightcrawler's character has resonated with audiences for decades, thanks to his compelling backstory and unique abilities. While Cumming's portrayal remains a fan favorite, the character's future in the Marvel Cinematic Universe remains uncertain. With the introduction of the X-Men into the MCU, many are hoping to see a more substantial return for Nightcrawler. The possibility of a new actor taking on the role is also a topic of much discussion among fans.

Regardless of what the future holds for Nightcrawler, Alan Cumming's perspective on his brief appearance in Avengers: Age of Ultron offers a fascinating glimpse into the complexities of filmmaking and the enduring power of beloved characters. It's a reminder that even a small cameo can hold significant meaning for both the actor and the fans.