imo having this kind of easter egg hunt for strong cards might force a lot of us to write similar characters, like "whats to be the king of kings". It's not like there's a lot of unique reasons a person might want to collect these kind of cards.

And it's not like we need an all-encompassing story, we could have a lot of smaller stories for a couple of characters each and occasionally an overarching plot pulls y'all together.
but that ain't really suggesting ideas for a plot...