According to series director Warren Spector, there was an internal rule in place that no Disney-related content created after the year 1967 would appear in the series (at least until the ultimately cancelled Epic Mickey 3, which was planned to take place outside the Wasteland), as he wanted to avoid using material that Walt Disney himself wasn't involved with. He noted, however, that this rule was broken more often than he would have liked, and was surprised that nobody ever called them out on it.