What will season 4 revolve around?

I havent read the comic but ik most the story i see some people saying viltrumite war but that seems very soon no? I mean conquest fight will finish i assume ep1 is gonna deal with conquest escaping. Does the war pick up right when the viltrumites ambush mark? Thats gonna be a crazy season if it does i thought they destroyed a planet more like season 5-6 territory