oh and im assuming you mean "detox" is out next week (which i cant find any info about except rumors of a September 2007 release )
dretox and pretox and others are just mixtapes of his work that he wont put on the album and other peoples work , i had pretox a few years back and it was rather erm POO
dre is an amazing producer but detox is 7 years in the making :O
i highly doubt it will ever be released now because its going to have to be amazing to keep people happy