User blog comment:SuperSaiyanKirby/It's last year all over again with Nick cancelling shows/@comment-4206859-20130815233829/@comment-1514401-20130816020524

Basically, Nick started it's cancellation of shows in like May or April when they announced iCarly was ending. So Marvin Marvin being cancelled earlier back in June is similar to that announcement. Now they've cancelled Wendell & Vinnie (I think Victorious was next for cancellation, so Wendell & Vinnie and Victorious both were cancelled in August of two seperate years), and they could now cancel the Haunted Hathaways and/or Sam & Cat.