After Technoblade escapes, Ranboo attempts to break Dream out of prison- then gets a flash back from when he is Enderwalking and Tommyinnit died. and then after that he runs away and never comes back.
Philza later comes and mines into the prison with Milk, and a Netherite Pick axe. Breaking Dream out. Then for some reason Dream Kills Philza (and because Philza is Canonically in Hardcore mode all the time, he's Perma dead :/). Making Technoblade get PISSED, (cause I mean- if I have to explain why you don't deserve to be making Theories.) does what our favorite Anarchist does best: Spawns Withers and Basically takes the Entire SMP into an Apocalyptic state :/ Thus being the END of the DSMP