I'd expect Iran to be on Best Behavior for a little while. They should have full clarity on the fact that Trump would be perfectly willing send a parting shot of TLAMs.
They will also likely prefer to not immediately antagonize the incoming administration, which they can safely assume to be weak on terror if not provoked. They can talk tough, and still reasonably expect the incoming team to suck up to them in order to re-instate the nuclear deal. Win-Win for the Ayatollahs... they look tough AND get their sanctions lifted.