Alright first up is the Season One Finale trailer where various plots seem to come to a head (Kraang's takeover plot and the Shredder/Splinter rivalry). Oh and it heavily features Roseanne Barr as the Kraang Prime so please turn the volume down for fear of burning out your eardrums:
The Season One finale should hit sometime next month. Now onto Season 2 news. We already know that Josh Peck will be voicing Casey Jones and Corey Feldman is Slash. Well now we have what Casey will actually look like! Here's the designs for the character made by TMNT co-creator Kevin Eastman:
UPDATE*** Nickelodeon has updated their website with an official video of Casey in action. You can view the video here.
There's also a design sketch for a new minion of Shredder called, Tiger Claw, who's a mutant tiger it seems. No really info there is other than this design (also done by Eastman):