Is Batman in DC or Marvel ?

The Batman (2022) 

Batman v Superman Dawn Of Justice (2016)

Many people ask this question.  Is Batman in DC or Marvel ?

Batman first time published in DC comics on 30 March 1939 

The character was created by artist Bob Kane and writer Bill Finger 

Boxing, Judo, Karate, Kung fu, Ninja Fight Hundreds of different fighting styles have been learned by Batman

Batman have  scientific knowledge, detective skills, advanced technologies, and as a proficient scientist, Mechanic 

Batman is physically stronger than a normal human. And he has 40 to 50 fighting skills 

Marvel DC Crossover