I’m not sure when it’s going to start airing. Mandy said they’d begin filming in January 2019. Typically there is about five months between when they begin filming and when the season begins to air but I could also see them want to film the entire season before it airs (this gives the writers and producers a lot more time in post-production).
I would currently count on the ending being traumatic. At the same time, it’s like… how much worse could it get? I say enjoy the next 12+ months of Homeland-free living and worry about all that later.