Based on the previous development time of the other episodes and how it's increasing gradually, the likeliest would be somewhere around October. If you were to be optimistic, late September at best. But given how long coding, render times and writing may take, the worst case scenario would be in either November or December. Although, given the narrative implications right now. Releasing this in November would somehow make sense since the Last episode was set on Halloween. Don't take my word for it, I'm just doing mental maths here.