According to Terence J. Rotolo, the series voice actor for Frank West, he was not asked by Capcom Vancouver to reprise his role for the fourth game due to Dead Rising's asset manager, Trant Lee-Aimes, changing Frank West's character development. Lee-Aimes was asked by fans regarding the lack of Rotolo's involvement within the game, to which he responded in a fan Q&A:

"We wanted to work with someone to provide a more grizzled, older take on Frank at this stage. It's no disrespect to history or previous actors--TJ Rotolo has done a bang-up job."

Rotolo shared a petition made by fans through social media to have him return back for this game, but to no avail.
Contributed by Tuli0hWut