Incursions are coming! CCP just made this short announcement on the official EVE Online site:

"Master Kuvakei's great invasion Sunday was just the beginning. He continues to gather his minions and supporters in preparation for more incursions into known space. CONCORD reports indicate that probable invasions will begin sometime after noon UTC on Tuesday, January 25, 2011. The question is: are you ready?"

The Sansha's Nation incursions are part of the latest expansion update. Incursion 1.1.0 went live last week and introduced features like the new character creator, updates to the contracts system and more.