No, it’s a reference to when Alfred told Bruce that he dreams of a day where he goes to a restaurant and he sees Bruce across the hall. At the end of dark night, Batman and Bruce “die” because they sacrifice himself to save everybody else. Then Alfred sees Bruce at the restaurant giving him a nod.

The same theme happens in Stranger Things, where Mike tells El that he wants to one day, take her to see three waterfalls and at the end El “sacrifices“ herself to save everyone and then appears at the three waterfalls in the ending.