Well, it's more that the 'on screen' aspect of this is more a Season 5 question. For now, we're literally just orchestrating the conversations-in-Angband-and-who-is-absent-when aspect. So, whether or not we'll have Fankil (for now) is a question of whether Sauron says something like 'Fankil reports to me that....' in the Season coda. Or not.
I tried to tidy this up a bit and started updating it, but it's hardly a complete synthesis of all of our discussions to this point. Still, it is something, I guess:
View attachment 1982
A few things become clear when looking at this.
1 - Sauron is needed in Angband from FA 20-FA 60 (So, tentatively, Episodes 5-9). The rumor-mill storyline has his fingerprints all over it, and so we'll need to show him spying at the Feast, taking captives afterwards, etc. Any role he has in the East will have to be outside of that time frame (so likely after). Morgoth's presence is required for Episode 1, *possibly* for the Dagor Aglareb [if we want him to authorize it], and probably for the dragon R&D. But he can spend a good chunk of time mysteriously 'out' during this Season.
2 - The Ulmo's dream warning storyline is greatly condensed if we wait until after the Battle to have it happen. That's not necessarily a bad thing, but we should definitely consider moving it earlier. Currently, we have Finrod arriving in Menegroth to ask for Thingol's help in building his own protected cave fortress...right about the time Thingol learns about the Kinslaying. That is going to color that interaction strongly.
3 - There is no way the reveal of the Kinslaying can happen before the Dagor Aglareb. There is too much that needs to happen to lead up to it, and we had expressed a desire to have that Battle be the midpoint of the Season. So, either we push the battle back further and make the Kinslaying reveal the midpoint, or we deal with having the reveal happen after the Battle. Episodes 6 and 7 are currently rather sparsely populated, but Galadriel doesn't even arrive in Doriath until Episode 6, and she's supposed to tell some things to Melian and everything to Celeborn
before the truth comes out to Thingol. We simply can't. If it's any consolation, the fallout of the Ban can show up in the contrast to the response to Glaurung vs the response to the Dagor Aglareb. I should note that, as the season is focused on reconciliation, the fallout from the Kinslaying reveal is even more important than the efforts to conceal it were.