The plot point that Roy Thomas introduced in AMERICA VS THE JUSTICE SOCIETY was the existence of Bruce Wayne's diary.

LAST DAYS showed an apocalyptic event in 1945, which required the JSA to participate in Ragnarok in order to undo it.

Yes, there was an effort to minimize the age difference between the two. But she still comes off as being older.

Liz is making a fat jab, and Betty is more upset about sounding old. That's not a complaint of someone who's only supposed to be a year older than Peter.

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Interesting. This is what I was remembering, from ASM #9:

Now that suggests to me someone who is not much older than Peter.

Perhaps Stan couldn't make his mind up!

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At this point I do kinda wonder when exactly Namor lost his memory and for how long. I can't imagine him wandering around for decades not remembering who he is.