1. predicate nominative - A predicate nominative renames the subject of the sentence. The fans are renamed as "they".
2. object of a preposition - The preposition is "to". Both Brendan and me are objects of a preposition.
3. he - If you rearrange the sentence He and Tony will be working is correct.
4. we're - The contraction is correct because the sentence should be "we are not planning"
5. its - Each is singular so the pronoun that agrees must be singular as well.