Just read the manga...Chapter 340 onwards

w8 at least 10 or 12 ep more maybe they return to the main arc

okay one of my friends told me 6 ep. like when it first started...my guess is theres at least 6 more ep. 2 fighting 2 explanations and then 2 to finish it off

After that arc they show ulquiorra fighting ichigo then they start a new arc while they are in the middle of the fight so dont get happy yet.