as a character for of mice and men, it is likely to be curley as he is the only character never to have been named. my english teacher is betting on him too. however, it could also be George, or Lennie, as they haven't come up as individual characters yet. it is only their relationship that has been a question. or, they could do the dream and not do a character, or they could do the shooting of Lennie. there really are lots of different possibilities, but i think curley or the dream are the most likely.
for an inspector calls, the most likely character is definitely mr. birling. i don't think they would do eva, and i really hope they don't because that would be hideous. they have never done the inspector's speech, so that is also likely to come up instead of a character. for themes, i don't think prejudice has ever come up. i'm thinking it will be mr. birling, but i'm not sure about the other choice