G.O.A.T - (Spoiler) Question

If Thalapathy 69 is Vijay's final movie, why was G.O.A.T (Thalapathy 68) left on a cliffhanger with the numerous clones?

At first i thought it was simply as a B.O opportunity, if any of the director's movies were to fail, he would simply pull out this part 2 but it doesn't seem like it's just a B.O opportunity right?