Just today Mitch Axelrod, who wrote the Beatletoons book about the cartoon show, posted on Facebook a long explanation as to why he's so passionate about the cartoons; definitely worth a read. He posted it to the Fab 4 Free 4 All podcast page. Long story short: he was three years old when they first aired and he loved them, and reruns got him through a very rough childhood.
Mitch is really pining for these cartoons to be released, but he's pretty sure it won't happen because of today's PC culture...and some of them are pretty darned, well...let's be blunt: racist.
A lot of older cartoons aren't PC by today's standards, but so what? It's just a product of the times. It would be one thing if the rights to The Beatles songs holds up any possible DVD release, but I sincerely home the PC Police wouldn't be the ones keeping the show from coming out.
Watch most beloved Rankin Bass Xmas special, and the antagonist is usually speaking in a Russian accent. Could you imagine if they tried the same today (would probably be a middle Eastern accent instead of a Russian one)?