Which Character Has Just Returned in This Batman Comics SPOILER?

I haven’t read much in the way of DC comics for a while, but it turns out that Bruce Wayne lost his memory in “Endgame.” As a result of that story, the Joker was also healed and his memories may or may not have healed.

Now, in the last couple pages of the new Batman #47, it’s looking like Bruce is finally getting his memory back and he’s just encountered someone with a very familiar smile.

Source: CBM