Talk about resurrecting a zombie thread.
Since the original post references a story I covered, here's some additional info on the subject:
The plan prior to the pandemic was to make a parade for the 50th that would incorporate floats, performances and music from a multitude of Disney parades. This was confirmed to me by a third party vendor specializing in niche areas that Disney (and others) use when designing/refurbishing floats. Enough time has passed that it no longer threatens that individual's career to give that sort of information. A second source worked on Disney's themed components like what you find in their hotels / attractions and had seen bid requests that gave away what was happening.
Ultimately the parade was cancelled due to the pandemic. Even if Disney could have gotten the floats and refurbishments in place, there were concerns that staffing issues meant it simply couldn't be brought to an acceptable show quality. It's a real shame as it could have been a great spectacle.
Have fun, I'll check back in a few months from now.