JRPGs have always confused me: that their titles are also confusing comes as no surprise. All I know is that Final Fantasy seems to be having difficulty reaching finality.
The Divinity series is fairly logical though. We have:
Divine Divinity
Beyond Divinity (presumably these two can collectively be called Divinity I)
Divinity II
a.k.a Ego Draconis
a.k.a Dragon Knight Saga, with Flames of Vengeance
Dragon Commander. Which presumably isn't Divinity III.
Divinity: Original Sin. Which may or may not be Divinity III.
Divinity: Original Sin II, arguably "Unoriginal Sin: One Careless Owner".
And in future, something else using the D:OS engine, which may or may not be another D:OS. Also another Dragon Commander (or perhaps the original Dragon Commander with added stuff? Pure speculation here) which may or may not be the third game using the D:OS engine. Since it's the third game using the D:OS engine, maybe it should be Divinity III.
And we all want another dragon knight game. Which could be a Divinity III, or Ego Draconis II, or Dragon Knight Saga II.
What we do know is that every Larian game set in Rivellon is at least called Divinity. Except for Dragon Commander. And possibly except for Ego Draconis I mean DKS which is Divinity II until they maybe changed their minds about that.
argh
