Sunstorm wasn't originally a reissue. It was a repaint of reissue Thundercracker, but not an actual reissue since the character or toy never existed in the first place. A lot of other e-Hobby toys are reissues of Diaclone or Microman toys, rebadged as Transformers and given new identities and expanding the G1 universe. But toys like Sunstorm, Gadep etc. aren't reissues.

Black Megatron is a reissue of a Microman toy (MC12 GunRobo Black Type) though.