>>718014209
>Kiryu Gaiden with it's 13 chapters (standard in the series)
7G was five chapters, what are you talking about?
Gaidens are intentionally made to be small side games but still considered mainline.

>>718015713
>Being fair: Makoto in 2 Kiwami wasn't really "canon" IIRC?
Yes it was. The entire story exists to explain how Majima gained legal rights to Majima Construction and Kamuro Hills' plot of land. The issue here is that if she appeared in 8G it should just make him depressed about Park, not Makoto, because Park was the love of his life and he spent 20 years obsessed about her. If he had a moment where he spoke to her about Park or something it would have worked, but him fawning about her yet again when 5's events have already happened would have been even stupider.