I'm hearing Man of Tomorrow is reportedly set to be a prelude crossover event to the big giant crossover event.
Man of Tomorrow will be a culmination of what happened in Superman, Peacemaker, and Lanterns.
Each universe will have it's own lead character from teams in 'AVENGERS: DOOMSDAY'
There will be a group of characters that will stay in the universes to protect it and there will be another group travelling across the multiverse and TVA to hunt down Dr.Doom.