Originally Posted by
ducklord
Generally, I'm not a huge fan of characters recalling anything about their previous continuities. That way would literally lead to madness for most people, and at the very least lead to some dumb dialog/stories. Better, for the most part, for the lion's share of characters to never even know they had other existences, and even for the ones that do know about it, they should really only know about it in the abstract. I really don't want, say, Aquaman knowing that, in another reality, Black Manta killed his infant son, or Ralph Dibny knowing that, once upon a time that never was, Jean Loring killed his wife for reasons that were never properly explained.
As mentioned upthread, I'm kind of okay with Superman, Batman, and Wonder Woman having a little more knowledge than everyone else. Their lives have gotten downright mythic/insane at this point, so having them a wee bit more aware of their constantly shifting reality seems fair.
But in the day-to-day storytelling, it really shouldn't come up much at all.