Currently, we're on Titan Return line, with the gimmick that little guy can turn into head for bigger guy, or a pilot, or a machine/folded thing for little companions. Is it possible, and how cool it'd be if we get a Combiner that also has the TR gimmick, so the whole combiner component (4 dlx and 1 voyager) is a TR body. Of course the voyager won't be triple changer (well, it is. Robot, body, and alt mode) to not over complicate the design, but imagine how cool it'd be! And the TR can ride inside the combined mode or become the (folded things) for the weapons, or folding and become an engine (a la the other master- I forgot the name, other than Head and Target) for the combined mode. Is it possible, and from the price point, will it be worth it? Just a random thoughts, but I'd really love if this become real. I mean, we already had Pretender who is also a combiner back during G1 days.
Could it be done? Sure. But Hasbro works under budget for design work and every transforming head probably counts towards an accessory lost. We'd be running into an unarmed combiner, potentially, if they try to stay on track...or suffering some other design loss.
Technically if you buy a Titanmaster pack (like Apeface) your getting a figure that is a Headmaster, is required to fill out a portion if the vehicle mode(Powermaster), is essentially almost a standalone non-transforming toy with a transforming vehicle(ActionMaster), and also serves to fill out a portion/man a weapon(Targetmaster) for $5. Combine it with a deluxe and all of those gimmicks work together.