Adam B. Vary Senior Entertainment Writer SPOILER WARNING: This story discusses major plot developments across the entire first season of “X-Men ’97,” currently streaming on Disney+. To say Marvel fans have enjoyed the first season “X-Men ’97” — the continuation of the beloved animated series from the 1990s, widely credited for laying the foundation for the explosion of superhero cinema in the 2000s and 2010s — is a bit like saying Wolverine has a bit of an anger issue.