How about starting a DD train between Delhi and Bhopal and shift that Shatabdi rack to Mumbai- Aurangabad as a new service. A janshatabdi service is already there so it can run riverse of the same. Or
There can be a shatabdi from Bhopal to Ahmedabad via Ujjain ratlam Baroda.
or there can be a shatabdi between Udaipur Jaipur Delhi Cantt and back.