hmmm... you know batman has legitimately beaten darkseid. he found out the activate codes for the hellspores on apokolips and changed the, the nset them as a time bomb
so now if darkseid kills him they'll still go off, and to get them to not go off, darkseid has to do what batman wants (in this case letting supergirl free of his control). if batman can pull that off, and i'm not being a bat-fan, c'mon, that totally legit, he can certainly create a scenario on his HOME PLANET with all of his resources on earth.
anyway, y had a good point that if the question was on the league, even elongated man, (both well known detectives, also both now deceased) of course batman would be on the team! he is pretty much the best hand combatant in the world, without his gadgets. so, i also think that bats would totally kick green arrow's butt. no offense to ollies awesomeness though.