Ask MGM to release At the Earths Core and Warlords of Atlantis on DVD
Currently MGM has release The Land that time forgot, and The People that Time Forgot, on one of their Midnight Movies Double Feature DVD's.
Please contact MGM, and ask them to release the other two movies in this series, At the Earth's Core, and Warlords of Atlantis, on another Midnight Movies Double Feature DVD. Let them know you would be interested in purchasing it.
Go to this page:
http://www.mgm.com/midnitemovies/
And near the bottom of the page click on "Contact Us" to send them an e-mail. Include your own e-mail address in the "From" field.