Mr. Laser Beam wrote:
Yeah. Window cameos. Appearances by Green Hornet and Kato. Things like that.
rights issues haven't yet been resolved, have they? AFAIK, to clear them for home release would require negotiating with each and every one of the actors who appeared in them (most of the window cameos were unpaid, uncredited walk-ons), which can be problematic in the extreme.
Also why the HELL were Green Hornet and Kato even on the show? They aren't even DC Comic characters.