Well, considering Gundam00 (another graphics heavy, mecha production by Sunrise) stops airing around that time, I'm not too surprised that Code Geass is resuming.
And, I do hope that we actually learn some things about C.C.'s "race" or whatever they are, along with the Thought Elevators, that weird shadow planet that's been in all the OPs, and the like... I'm also incredibly intrigued to see what happens to Shirley. Surprisingly, one of my least favorite characters turned out to be central to one of the most interesting storylines in all of the first half. And Lelouch won't be able to Geass her this time...
On a related note, I hope the storyline, and all further events involving my least favorite character (Nina) end. Now that Euphie's dead, I wishfully can't see much of a purpose for her anymore. I also hope Orange-kun dies. That character started waxing cliche since Narita... Super strong enemy pilot who is mentally unstable and obsessed with beating the protagonist? Please, was that archetype ever anything but an excuse for flashy fights?
I hope to see more out of Suzaku. Yes, I still like him. (Remember, this is coming from Kira Yamato's #1 hater) And although I'm not willing to debate it with you all, I don't see him as being any worse than Lelouch or C.C., especially by the time the first season ended. Different sides of the same coin, if you ask me. Let's see if he can lead troops as well as dish it in combat.