Vande Bharat should replace all Shatabdi Trains. Some of the Vande Bharat Could be introduced are as follows :-
Bangaluru - Hyderabad
Chennai - Bangaluru - Mysore
Mumbai - Pune - Secundrabad
Banaras...
more... - Patna - Kolkata
New Delhi - Jaipur - Udaipur
New Delhi - Bhopal
Guwahati - Dibrugarh (After Electrification gets completed)
Gorakhpur - Lucknow- Moradabad - New Delhi
Howrah - Bhubaneshwar - Puri
Secundrabad - Vijaywada - Visakhapatnam
Chennai - Guntur - Secundrabad - Hyderabad Deccan
Chennai - Rameshwaram
Chennai - Vijaywada - Vissakhapatnam
Gaya - Patna - New Jalpaiguri
Chennai - Coimbatore - Allepey
Indore - Guna - Gwalior - New Delhi/H. Nizamuddin
Howrah - Bilaspur - Raipur
Tata Nagar - Bilaspur - Raipur - Nagpur
Howrah - Gaya - Banaras
Many other routes can be the possibility.