The risky flip was kind of a precursor to this trick and was one of the first off axis doubles done. It was more of a d-spin to backflip, but was a lot closer than the Schrab (sp?) brothers double mistys or Toben Sutherland's flair to fronts that were being done around the same time.
Then mike wilson started doing wilson flips which are basically really inverted double cork 10's
best video I could find was his one over the halfpipe in TBC
After that Jon basically popularized doubles, first with his kangaroo flip and later with the DJ flip and Hexo flip. His DJ flip is basically so close to a double cork as well.
Also around the time of the kang and DJ flip other pro's started doing doubles as well. First double flats, and later double corks replaced switch spins as the must have trick. PK and Wester were some of the first guys doing true double corks in big comps but a lot of people were probably doing them by that point.
Now basically you need a double cork to really be competitive, and the latest variation is a double cork 1620 by TJ.
thats a quick history off the top of my head, haha just procrastinating doing my physics