Superman of 2965
The Superman of 2965 aka The Superman of 2966, aka The Superman of 2967, a direct descendant of the present-day Superman.
Superman 2965, whose adventures take place in the 30th century is chronicled in Superman No. 181, Action Comics Nos. 338 & 339, and World's Finest Comics No. 166. His secret identity and origin is shown in Superman No. 181.
His "daringly different" secret identity is Klar Ken T5477 and he works for the Daily Interplanetary News. His colleagues include Lyra 3916, who is mad for Klar but despises Superman, whom she considers a "piffle-diffle" (future slang for a conceited person), and Jay L-338. They toil for a super computer PW-5598 that is programmed to behave like (and was created in memory of) Perry White. This Superman's weakness is no longer Kryptonite, but sea water that is contaminated with radiation of an atomic war. This lethal radiation is also present in the seas of other worlds. His principal foe is Muto, the super-intellectual mutant who comes from a dimensional rift.
Superman 2965/66/67 is not an imaginary story, parallel world, hoax or dream but an eddy in the timestream of classic Superman mythos.