John Carbonaro, a longtime fan-turned publisher when he purchased the rights to the T.H.U.N.D.E.R. Agents, passed away at age 58 on February 25th, as reported by long time friend Robert J. Sodaro. Carbonaro purchsed the former Tower characters in 1981, and a rather long and convoluted rights battle with various entities prevented too much from being done with them subsequently. DC had planned a revival of the characters in the early 2000’s, but Carbonaro withdrew approval; however, DC did publish six Archive Editions of the original material.
Mark Evanier has some more remembrances.
According to Sodaro, Carbonaro did assign the rights to the T.H.U.N.D.E.R. Agents to an heir, so we may still see them again one day.