Yes, something along these lines was planned since after N.i.n.e.'s release. I really enjoy doing this kind of games, but, apparently, those liked most are the shorter and less obscure ones.
Now, after over 40 releases, I'm currently taking a break from development to follow other non-gaming related projects, but I'll make sure that my next game will be a worthy sequel to N.i.n.e. 😉