Complex sentence: Many fans of the characters refuse to read this final story, and when O'Donnell brought his comic strip to a close five years later, he chose to do so with a more upbeat story promising future adventures.
Split into simpler sentences: Many fans of the characters refuse to read this final story. When O'Donnell brought his comic strip to a close five years later, he chose to do so with a more upbeat story promising future adventures.