Batman and Superman are best friends, they would never fight to deathThey share the same universe but are completely different comics, Superman is an alien but raised as a human... he can't have normal human enemies because he could just kill them with one punch. Batman can kill with a punch also but he don't uses that force against his enemies.. he just breaks bones. In real life he would kill a thug but it's comics were he don't and has a moral code. Same goes for superman. Batman could easily kill superman and aquaman could easily kill batman. It all depends on writing.Batman is the weakest of all the current justice league members. So they give him credit to abuse all the weakness of superman or wonder woman etc. This has no honor and bruce would use a friend as help but there are times where no good is. Bruce knows that better than clark. In Endgame batman loses even with his giant mech. He wins til he uses kryptonite. Everybody would win with kryptonite.You can't enjoy batman comics if you think that he is the badass and the best. He is not. He is a supercop and has his own universe. Superman has his own universe with alien earth threats. If i want to read some grounded comic i buy batman but if i want to see alien human threats i buy superman. It depends on mood and so on.Don't start useless fights. Superman could win, even aquaman would win against superman or superman kill all justice leaguers.