No. Togashi has stated he has several plot arcs planned. The "Succession War" is likely only the second act of the Dark Continent Expedition arc. Do not expect an ending anytime soon—enjoy the journey.
Yes, Manga Plus offers of every chapter. You do not need a subscription to read Chapter 411 for free the day it comes out. Just go to the Manga Plus website or app. hunter x hunter chapter 411 hunter hunter manga online link