About the Void, we've aleady travelled there in the past, there is nothing there but monsters and a few weird crystalline platforms - it's the World of Darkness. So I don't see it factoring in that much honestly.
Really I see
Garlemald tearing itself apart due to Varis's assassination (which after all, was exactly how Emet designed it and fated it to be, although I doubt Zenos would want to take the throne as all he's interested in is his 'Hunt' (namely, chasing down and fighting the player's character endlessly). And although Zenos did everyone on Hydaelyn a favour by killing his father and driving out Elidibus from his own body, thus preventing the unleashing of Black Rose on Hydaelyn and preventing the 8th Calamity, there is still the unknown factor as to exactly what Gaius and Estinien are going to do. I presume they'd destroy Varis's factory that was producing it and the new stockpiles he acculumated but it's unclear.
Really, it's clear Elidibus is being set up to be the major antagonist, although it remains to be seen how effective his plans will be (especially his threat to 'unleash other worlds' 'Warriors of Light' against us. I mean, there are only like three remaining Shards other than the First still in existence, and to travel between them and the Source requires the person to be dead or at least incorporeal, so unless he finds away around that, it means he's probably just repeating his previous plans, and all the weaknesses of them. After all, those who do not learn from their past mistakes are doomed to repeat them.