Family Reunion in 'Kung Fu Panda 3' Trailer

We cap off our week of animated movie trailers with the return of Jack Black's kung-fu panda in the third installment of the Panda series, but I have to admit that I've never seen any of these, despite it supposedly being one of Dreamworks' best animated franchises (the How to Train Your Dragon series probably trumps it at this point). I don't know- is it worth catching up on? I'm actually surprised they're doing a third, since I remember the second one disappointing at the box office. I guess that explains the January release date.