The Asylum Ent. has just recently announced their version of the same story the classic 1975 film was adapted from which was originally directed by Kevin Conner. For anyone unfamiliar with it details and several posters can be seen here:
http://www.imdb.com/title/tt0073260/
This new version will be directed by C. Thomas Howell is set for release on July 28th. More details can be found here:
http://robojapan.blogspot.com/2009/03/land-that-time-forgot-remake-begins.html
As well as the trailer for the original here:
http://www.dreadcentral.com/news/31022/the-remake-that-time-forgot
http://robojapan.blogspot.com/2009/04/first-photos-from-land-that-time-forgot.html