Actually, when Sony Ericsson starts its special presentation at the upcoming CES on January 9th, we might see this model rolled out as the Sony Ericsson Xperia Ion. The joint venture filed for a trademark on the Xperia Ion name on December 13th with a serial number of 85493863. The trademark application is requested for mobile phones, the same answer Sony Ericsson put down for its trademark applications on the Sony Ericsson Xperia PLAY and Sony Ericsson Xperia arc.
This will probably be the last flagship model to have the Sony Ericsson branding. Sony announced earlier this year that it is buying out its partner in the joint venture and will be dropping the Ericsson name from its phones sometime in the middle of next year.
source: Fusible via Phandroid