Hmm, I'm still liking the idea of dragging down OBERON from his perch and making him engage with us as Sugou. Thematically I feel like it fits with the "tear him down from his HEAVEN."
As for SEED and Ragnarok - here's my pitch on the angle I'm seeing: Forcing Sugou to think of himself as Sugou instead of OBERON is bringing about the end of the Gods. It's a bit unconventional, but the SEED wants to tell a story and I don't see why it wouldn't find a twist to how it is done acceptable - it already cobbles together disparate mythologies together and a "prophecy twist" where the destruction of OBERON is a matter of self-acknowledgement rather than literal physical destruction is right up that alley IMO. And like, I feel like the teardown would be suitably dramatic/climactic. Furthermore, setting ourselves up as a God kinda runs counter to the idea of bringing an end to the Gods (but like not entirely because there are survivors in Ragnarok, more on this in a sec) replacing one with another. This way we "defeat" OBERON by forcing Sugou to confront the fact that it is a delusion he created for himself to avoid facing reality and thus bring about the end of the gods in totality.
Now, to bring this back to Ragnarok some more and the fact that at the end of it there are still survivors. I think we can lean into the idea that it represents a cycle with Ragnarok signalling the end of one and the beginning of the next rather than literal survivors (in fact SEED saying that our success is a literal end of service for ALO bolsters this idea I feel) by pointing out that once his delusions are torn down and this game ends, most people aren't even going to care - the victims, yes, of course - but for most they're just going to move onto the next VRMMO (aka the next "cycle") just like they moved on from the SAO Incident to keep on playing other VRMMOs.
Finally, this is less about what we say to Sugou but more an observation on SEED. When we talked with it a few days ago it stated that Ragnarok was the wish of the people and Hiyori internally noted that was incorrect and that it was probably only the Fangs of Fenris who did (and Sigurd. Poor Sigurd.) However, we do have the play of releasing the video of the accusation to sway the players of ALO to really wish for it. I don't think that's the play right at this moment but if the ALO players make it here, or a suitable moment comes up, or things go poorly for us I think it's a potent secret weapon if it can turn player sentiment harshly against Sugou/OBERON in the moment. Narrative effects aside, maybe a massive debuff?
Anyway, I'll try to put out my own pitch here as an actual vote. It's similar to the idea I proposed before, but just an actual vote now. Hiyori turns the vicious up to 11 - as if Endou was basically a friendly chat - to break Sugou.
[X]Plan: Twilight of the Gods
[X]Write-In: Sinking Into The Sea
-[X]"A God? Really? Because all I see here is a manchild trying to run away from the fact he's a loser who can't do anything but be a shitty copy of Kayaba. (Gesture to the surroundings) "This place? Alfheim? The World Tree? Just a discount Aincrad and Ruby Palace - complete with the shithead who couldn't just keep his fantasies to himself playing the part of final boss. ALO? Just a shitty, buggy knockoff of SAO. Hell, it's running on Kayaba's SEED even - you couldn't even find a shred of originality in your copying! Actually, that being the case, how'd you fuck it up so badly? If nothing - and I sure mean nothing - else, Kayaba didn't let cities fall into the goddamn abyss and have, what, three Excaliburs running around. How do you screw up a system literally designed to run on auto-pilot? Well, whatever, once this shitty game is put out of its misery everyone will just move on to the next one. Oh and that get-up there with the sword and shield? Are you so obsessed with Kayaba that you tried to design your character around him? I mean, you do you, even if all 'you' are is an incel who can't even measure up to someone even when he's copying their homework. Time to wake up, Sugou Nobuyuki. Time to come back to the real world where you're nothing more than a corporate drone looking to blame everyone else for your own failures just like almost everyone else. "
-[X] (If/When Hiyori learns about Rinko) (Mocking laughter) "Ohhhh, so that's what it is. I was wondering how The Flash fit into all this. She didn't seem to fit the pattern - you basically being a bad Kayaba LARP. Sure, she was second-in-command of his guild but this whole Titania thing felt a bit much. But I see now! You're just one of those white knight creeps who thinks he 'deserves' someone because he was a 'nice guy,' huh? Well, can't say I'm surprised! Though you kind of blew that carefully crafted image when you tried to choke her don't you think, you sick freak? So, all this bullshit here - the chuuni RP, the power trip, all of it - is because you can't get over the fact that your crush dared to love someone else, huh? Asuna is just your replacement Rinko because even here you can't have her. Aww, but that can't be right, can it? The SEED's chargen has got to be better than that, so I think the truth is that you know you didn't deserve Rinko just like you know you don't deserve Asuna - or any of this. (Mock pity) Poor, poor Sugou. Even in his dreams he knows he was just a placeholder, isn't it sad? (Serious) Grow the fuck up."
Willing to take suggestions, editing advice, anything really lol. Plan name is a reference to how after Ragnarok the world sinks into the sea and metaphorically we're dragging Sugou down with it.