It wouldn't surprise me if they are trying to crew this out of Washington which does have a sleeper base for the Capitol Limited.
The worst part of this will be the arrival into DC and NYC where the attendant will probably wake everyone up at four AM to refreshen the room so that they themselves can get off on time. If there was ever a pet peeve of mine that is it. Every time I'm on the train into Chicago they kick you out of the room for five to ten minutes once you get past South Bend. Personally I think we should just have the coach cleaners handle that work. It would be better from a customer comfort standpoint.
When I took the Night Owl in ‘01 and ‘02, I don’t recall them waking anyone up for NYP. I think there probably are not many people using that stop. They did not make an announcement, and I dont remember hearing the intercom until DC. Obviously, things could be different now.
That said, making people get up early on an overnight, 9 hour train, is silly, and doesn't make any sense, so I doubt they would do something like that.