Superman/Batman: Public Enemies
United States President Lex Luthor uses Superman to be framed by a Kryptonite meteor's on-coming trajectory and announce a $1 billion bounty on the heads of their Man of Steel and his'partner in crime', Batman. Villains and heroes launch recruit assistance -- and a constant pursuit of Batman and Superman, that must combine and slough off the onslaught, stop the meteor Luthors plot.