I do not think the late additions of Stallone and Diesel mean that they must be vanilla. They could be a power role, mafia, have a special role without night actions like miller or beloved princess, or be a third party role. I'm not speculating about what their roles are, just pointing out that it's not safe to assume anything yet.

Also be careful about speculating Arnolds role based on how he is playing. It's classic WIFOM.

WIFOM - MafiaWiki