What about the scene between Kay and Michael when Kay was leaving after visiting the kids. Hollywood taught us that Michael was going to let her back in the house and everything was going to be great again. But the look he gives her, and its not even a look but its a silent moment.

The more I watch Part 3 the more I get the sense of a King Arthur type role for Michael.

Edit: Also, what about the 2 looks Kay gives at the end of Par 1, first when Michael says "NO" to her about doing anything to Carlo, and next when the door was being shut as they kissed his ring.