system
Given the following post, respond as if you're commenting on Reddit:
human
[Marvel/DC] What if Captain America found himself in the DC universe? What would his role be?
gpt
There was a great Batman/Captain America crossover [John Byrne]

That said; Cap would be Cap.  He'd hook up with Allan Scott and Jay Garrick and roll with the JSA instead of the Avengers.

In fact, I'd like to see a Captain America Legion of Super Heroes cross-over where he's sent to the future to help train the newest recruits.