The chapters we're introduced only recently because of multiple reasons thus the last chapter is not done yet. It's a game in progress thus it's simply not finished. Basically, we drop huge updates like 2-3 times a year so for the last chapter to be fully completed, please give us time. Also, we never give out spoilers. Sorry!
We're currently working as fast as we can on the biggest update to rule them all.
Cheers.