Can be extended to NZM . Can cover distance in 5 Hours 30 minutes (which is comparable to Main NDLD-JP trains via RE)
It will give a afternoon Shatabdi to AGRA and an alternte route to JP as well as better connectivity to Mathura from JP
I doubt it will be success if extended to JHS OR GWL.
Extending to Bhopal will be success...
more... but distnace can be too high ?
Extending to LKO OR CNB is good but again I guess distance will be too high for a Shatabdi.