*EDITED*
Before the Black Series, Hasbro had plans to release a line of 6-inch action figures as part of the Episode I as shown in the 2000 Hasbro Toy Fair catalog. This assortment was planned to include Darth Maul, Qui-Gon Jinn, Obi-Wan Kenobi & Destroyer Droid.
Ultimately line was cancelled and most of them were later released as part of the Power of the Jedi line as the "Mega Action" assortment. However, the Qui-Gon Jinn figure never made it to production.
I have seen preproduction items for this line. If you have any, please feel free to showcase them here!
These were all released as the POTJ Mega Action line except the quigon. I had a hardcopy for the Quigon. I'll have to see if i can find an old photo or 2