I remember them saying something about there being potential for seeeveral AC games before, but he has a good point. If they feel like they can handle it, and can pull off one successful game after another, why wouldn't they try for it?

That's assuming that things don't start getting TOO asinine or convoluted. But the AC team seems to know their limits and strengths well enough so far. I'm sure they'd know if things were coming to a definite stopping point for the franchise. As long as they keep impressing me, I'll keep buying into it.