I dont really consider CC a sequel to Chrono Trigger, as it really didn't have anything to do with it other than Schala and stuff... It was pretty blegh... Alright as a standalone though (I imported it when Square was "unsure if it would make it to the states"); but anyway;
I see CB as a proper sequel; possibly involving Crono and Marle's kids... Although the stopping lavos from beginning wouldnt be possible since life originated from Lavos
no I mean
destroying the creator of lavos :p basically they might be more than one lavos, then again yeah a true sequel would really be loved, I loved Magus and Frog story, but they could also do what Terranigma series does, basically they took the same story and made it in a different context, if you compare Terranigma, Ilusion of Gaia and Soul Blazer, you find nothing related just reviving earth, and humans, again I would not worry about what IT will contain, knowing the creators and the idea behind Chrono Trigger/Cross you will realize that the team are the best of the best
, so lets just wait and see.