So far we have GES, which blends heavy and melodic elements, and on the other hand there’s Revenant, which is pure chaos.
My prediction is that the next single will be something fully melodic, similar to what Two-Way Mirror or Is It Really You? were at the time, in order to balance the styles across the three releases.
Based on the track names, I’m leaning toward Gemini being that single, since Entrance sounds more like an intro, while Block of Flats and Fortress Down seem to point toward a heavier sound.
As for the release date, I’d expect it toward the end of this month or early June.