In 2005, Warner attempted to release a DVD set with the full series, but was refused the rights to several of the celebrities and characters that were guest stars, including The Addams Family, Josie and the Pussycats, Davy Jones, Sonny and Cher, and Jeannie. A "Best Of" DVD was released with 15 episodes containing the guest stars for whom Warner had been granted the rights. The opening titles of the DVD of this release were also edited to remove all the guest stars. It is unknown whether the remaining nine episodes will ever get a release.
Later developments that WB can release other shows containing those characters has raised questions of exactly how many of the nine others are holding up the release. But more than likely the set won't come unless all nine can be cleared. And even back then, the first release has a "1" on it which, back then, barring one outlier, meant they at least planned to put out a "2". The Diamond Collection re-do didn't add any of the nine, so as 2017 they are still held up.
Teletoon Retro in Canada started showing all the New Scooby Doo Movies around 2012.