Who have you heard joesph gordon levitt is playing in the new batman film hoping robin myself?

but i hear he is playing a character john blake which i feel may being playing a new batman for instance if bruce gets injured in a fight with bane there are 3 different batmans they all get trained by bruce when he is unable to fight or old the bat is not looking to good in the trailer worst hes look in a fight in all the films bane did break the bat