>>56796363I happen to be an expert on this topic.
First, a shout out to that absolute unit of a scholar, Zinzolin, who deciphered the Abyssal Ruin glyphs.
Where to start? There's the final battle rewrites, Ferris wheel rewrites, random lady in Mistralton who says "N claims he is the literal physical child born of a Pokemon", N cold proselytizing the player in Nacrene to release their Pokemon like he's a missionary on the streets of New York, the crazy earlier version of the Nacrene encounter where he speaks with tildes and replies to Cheren outright asking if N is human with "I'm the child of a Pokemon, you wouldn't understand", Team Plasma (who are by all signs under N's direct control in this revision) stealing Pokemon to release them rather than shamelessly beating Munna half to death, the list goes on and on.
To summarize the general trend of my findings I'd basically say N's ideological strength, culpability and agency were massively eroded in favor of Ghetsis the unabashedly evil manipulator until we end up with the final release.
I've always seen and loved remnants of this character in release BW so this has been incredibly exciting for me.From what I've looked at so far almost every single scene involving N (and Ghetsis by extension) has gone through multiple big rewrites while conversations with Gym Leaders, for example, go mostly unchanged from first implementation to release. Yeah, script changes might not be interesting to anyone without terminal BW obsession but lack of new public discoveries are not for lack of content. You could open almost any file for yourself and find something new. Hell, that's what I did today. My biggest problem right now is documenting everything.
I haven't looked at the B2W2 source or seen anything Colress related besides pic related, unfortunately. I love Colress almost as much as I love quoting "HOWEVER, I DISAGREE" so this hurts me too.
Keep an eye on today's concept art leaks just in case.