I can't tell you the exact post or posts this information was mentioned but it is my understanding from various posts on Seibertron.com that the follwoing issues are what has kept various TF's from being reissued.
Dinobots - Hasbro stated at Botcon 07' the molds were lost/ broken beyond repair.
Wheeljack - Takara has claimed the mold has been lost/broken.
Mirage - Takara has claimed the mold has been lost/broken.
Sunstreaker - Takara has claimed the mold has been lost/broken.
Shockwave, Omega Supreme, Jetfire, Deluxe Insecticons, Whirl & Roadbuster - Those molds supposedly belong to other companies and therefore Takara or Hasbro cannot reissue them.
With SkyLynx being reissued there may be a mold or two here and there that Takara/Tomy now has the rights to which would open up the possibility for other reissues.
As for the various KO's being made. Sure the different companies probably got a hold of a vintage piece to reverse engineer it so they could make the figure. But consider that the quality of KO products are
generally quite lower quality than the original Takara & Hasbro product. Maybe Hasbro & Takara/Tomy won't do it because to reverse engineer
AND improve the new mold to be indentical to the quality of the original is too cost prohibitive. Unless anyone on this board works for either company we'll probably never see the proof to that statement.
Personally I am hoping that with the encore series they release Thrust, Ramjet & Trailbreaker. I am just giddy to pick-up re-issues from 2001 that I missed out on. Hell, that's why I'm getting Ironhide and Ratchet even if the original G1 toys are atrociuosly ugly. I'd be one happy GeeWunner if they reissue molds they already have. It increases my chances at getting the three I mentioned!
