While I am no massive fan of the Prequels I must say I have been thoroughly enjoying The Clone Wars and this trailer makes me even more excited about Season 3 then I already was.
The Kamino storyline looks to tie in with the episode Rookies from season one. It also looks as though the clones will be getting their MKII armour this season. As for Darth Mauls brother, you have to take the rough with the smooth I suppose.