[quote=Alfhedil]
I was under the impression from the lore summaries that North Korea was already independent, albeit in pacts and economic treaties with the Chinese. Granted, there really isn't much about the Koreas in the lore summaries, so I'm kind of working with what I'm being presented here.
[/quote]

I think this is true. They're not a part of China, just heavily influenced by them. Either way, I don't think a rebellion to get out of the Chinese sphere of influence would go very well. Not to mention that, given how much support they get from the Comintern, I doubt they'd want to get out of it and go back to being on their own in a region almost completely dominated by China and the Comintern. 

A rebellion in South Korea might make a bit more sense, but you'd still be in a bad spot. Because in the end, even if you somehow succeed, you'll be sitting between China and the Comintern, and the Japanese Empire.