You are beating a dead horse, bro. lolol
Don Taco was gone for a long long time and is pretty famous among his fans for never really finishing his games. Rumors swirl around why. From severe ADD to dev cohesion issues, to taking on too much at once, to IRL work priorities, to relationship problems, to Game Engine issues.
Point is, who cares why. He is back as of this month!
He is currently working on "Small Complex". He may of may not come back to this one, but the rumor I heard was that he might just put all his characters into the big world he is creating in Small Complex. If you want more, check out his new updates on that game. No real timeline, but he says he is working on it.