Fill in the verbs into the correct passive form. Maybe the local festival ______ this year.

The sentence describes a future event that might happen. The passive voice is required because the festival is acted upon (it is canceled). Therefore, the future passive form 'will be canceled' is the correct choice. The other options are either active voice ('will cancel'), incorrect past passive ('was canceled' for a future event), or incorrect plural agreement ('are canceled' for a singular festival).