We do hope to release another batch of content sooner than next year (we hope for May or at worst June, actually), even though our prior release patterns might not inspire too much confidence. Even if we might not release many builds, we are working on the game.
We cannot tell you yet when new Brym content is going to come out, but we are working on it currently for day 9. It is taking us a bit, as we basically have to write out several different variances on him all throughout the entire day.
If you are interested in following along our development, we do make public dev diaries on our Patreon, occasionally, where we present things like our progress on character dates or stories. I imagine Brym will still have to cook for probably about a month at least still, before we can give more concrete news.