The next testing phase will feature a new desert planet called Liliipa, not to mention new story quests, new costumes, and something called a time attack quest. Fan site Bumped.org has the details on these and other reveals from last week's live event in Tokyo.
PSO2 producer Satoshi Sakai also showed off a new snow zone on the planet Naberius. He told fans that the upcoming open beta will be level-capped at 30, while players at level 20 and above will have access to hard mode quests and encounters.
PSO2 is currently in development for Windows, Android, and iOS platforms. The open beta is tentatively scheduled for "early summer 2012."
[Thanks to Kassandra for the tip!]