Lego Justice League: World's Finest

With Superman's mismanagement of the League and his failure to recapture the Flash, he feels as if he is losing power and has been pushed to the edge, resulting in him sending out a peace treaty to the Batman, hoping to regain his trust and put aside the past. With Batman now in possession of the Flash, whom he refers to as the "key to our universe," surely it would be foolish to go back to Metropolis and accept Superman's offer? Surely?