Ideally there is no sequel to Chrono Trigger. As is, this is about as good as any sequel to that once in a blue moon game had any right to be. As a stand alone game it's also one of the greatest of all time all by itself.

All that said, it had a profound effect on me as a teen/pre-teen whereas Chrono Trigger was the game I played a million times as a kid. They were basically exactly what I needed when I needed them, regardless of whether they were connected or not.