A key part of that plan involves their online RPG Phantasy Star Online 2. (segalization.com)
Yes, though I have been busy with work, I have played a little bit of Phantasy Star Online on the Dreamcast. (igotaletter.com)
This short interview from 1993 talks about various aspects of the development of Phantasy Star II, including the reason for its terrifically complex dungeons. (shmuplations.com)