6 months of planning!
do you understand how ridiculous it is to think you can plan anything decades in advance with this level of detail?
have you actually ever tried to write something long form?
do you understand that for you to believe this you'd have to assume that you can follow through on a story you planned years ago? do you remember yourself even 5 years ago and what cringy shit you thought was cool or interesting that you've since grown out of?
imagine having to publish something something right now that you thought of 10 years ago. it's fucking stupid
people grow and evolve their interests all the time, and when your work spans this large a timeframe its inevitable that your vision changes eventually, it may not even be a clique, but incrementally.
and for all the retards saying "but its obvious he had a plan for what was outside the walls all along hurr durr".
yes, of course, that's called a hook. I very much doubt he thought reiner and annie and bertholt grew up as jews in a nazi ghetto in early twentieth centiry version of a central european country.