Are you asking about the 5e Epic Updates in this thread, the friend and foes in ASCENSION, or my 5e Monstrous Compendium?Super excited about the next version of your stuff! Do you have any intention of or already have available your methods and thought processes for making the monsters you have made? I plan on using your stuff extensively since my campaign is going to level 40+.
OK, here is the breakdown (let me know if you have any more questions):Since I do not know the full details of the differences between the three, I will answer with: yes.
OK, I understand. That is the difficult part really. Here are some of my thoughts on that (in no particular order):What about the thought processes or inspirations for all the abilities, actions, ect. that you put into the creatures? I struggle quite a bit with this part of monster creation.
I know I made some gods at or over CR 40 and Azathoth might get to CR 50 (IDR). Additionally, some of the Primordials are effectively over 50 and Ahat-Hir, IIRC, is effectively multiple CR 50 or CR 60 monsters.Has anyone made new Monsters with this epic system up to CR 50 or even above and of so would you be inclined to share them?
However, I don't think my revised CR guidelines provided here are the best way to do epic 5e. If that is what you are looking for i would wait for @Upper_Krust's take next year.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.