This was explained, in-story, as they were transported into a pocket universe by Franklin Richards, the near-omnipotent, psychic son of Mr Fantastic and the Invisible Woman, to save where they lived in the so-called 'Franklin-verse', oblivious to what had happened to them. Following the apparent deaths of the Avengers, the Fantastic Four, and Dr Doom battling Onslaught in Onslaught: Marvel Universe, they were 'reborn', and certain aspects of their earlier stories were expanded with the intent of telling their adventures anew for modern generations. The first 'Heroes Reborn' was published by Marvel in 1996–97, and this would mark its twenty-fifth anniversary.
