FWIW - Harold and Kumar was an actual rumor floating around at the time of that map.
Beetlejuice is a more recent discussion.
And some history: Universal originally licensed Bill and Ted for a show because they were, at that time, known but cheap. The design team had an idea/need for a show and could get characters THEY liked because that was their era. HHN is what helped keep Bill and Ted in the broader zeitgeist. Face the Music likely doesn’t happen without HHN.
So, if Universal wants/needs a show with a similar dynamic (stupid buddies meandering about, meeting weirdos) but face the limitations of before (known but cheap), the modern equivalent is… Harold and Kumar.