I am all for a Chrono Trigger/Cross sequel, seeing Magus and Schala saga concluded, possibly the complete origins of Lavos explained etc. However the Chrono Trigger/Cross story series is long and complicated and I believe both games would need to be remade in a style similar to Final Fantasy III on the Nintendo DS, and get this game out to PAL regions that missed out, (unfortunately, a condensed plot summary just doesn't cut it for me.)
Though I really, really want the entire "Dream Team" reunited for this, as it would be quite monumental for the gaming community. The Chrono series is the one of the most popular, and defining series in gaming, and and also one of the few that hasn't been abused like Final Fantasy and Mario. If there is going to be a sequel to Chrono Trigger/Cross, I am happy to wait for it... I don't want some crappy, half-arsed rehash that took ten minutes to make! I want to see it done right! The fans deserve justice!