Going by all the details we saw in debut trailer of Saints Row 4 it seemed like, all Volition have done is took Saints Row 3 and added some more over the top childish sci-fi features (fans obviously hated them previously as well) and presented it as a completely new game.
via N4G: pc news feed http://n4g.com/news/1211895/is-saints-row-4-a-threat-to-gta-v
via N4G: pc news feed http://n4g.com/news/1211895/is-saints-row-4-a-threat-to-gta-v