Just out of curiousity I decide to take some guesses at what the last episode of legacies could look like going at the rate its going, I personally dont think it has much left in its tank, I could be wrong and it go on for years to come but here is a guess what could come in the final episode of legacies-
Hope and landon are going to be a full couple again, landon will help hopes humanity back on and help find a way for them to have a child.
Lizzie will get together with mg or ethan or both
The school will be either shut down or hope, lizzie, etc will be the new teachers for the younger generation.
Someone will get married, its such a common theme within finales anymore, I can see it happening here, I cant take a guess at who.
The final battle will be between the squad and the "gods"
A monster will make an appearance, maybe malivore and necromancer will appear
The triad will be officially closed down for good.
They will fit in penelope, jade, josie, rafael, freya and caroline as cameos.