(I'm kind of iffy on posting this in PSU general, so mods, feel free to relocate as you see appropriate.)

Copy-pasting from my post at PSUPf...

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http://www.g-heaven.net/topics/2010/10/101016b.html

Shougai PSO reported today about two new Phantasy Star trademarks that were filed by SEGA in the past few months. Initial applications were made on August 17, 2010, and the information was made public on September 9, 2010. The new trademarks are Phantasy Star Eternal Hunters and Phantasy Star Eternal Planets. No other information is known about the titles.

Shougai makes a suggestion that the titles could be an attempt at something along the lines of what the Pokémon games go for, but having two versions of (essentially) the same game with minute differences between them.