Well, Radical Dreamers was made to be a part of the Chrono Series, which was also what Chrono Cross was based off of, mixed in with Chrono Trigger. Just because the next Chrono game doesn't have Chrono, Cross, Radical, Dreamers, or Trigger in it doesn't mean it's not a continuation/sequal. *Who knows, they might even have their new game all about Ayla to try and give her a bit more of a meaningful back story...
*COMPLETE AND TOTAL SPECULATION