Bhopal is a capital and should get some dedicated connectivities to other states. It may have connectivity to a number of places but the number of seats are just negligible as per the level of city. Some dedicated trains which I think Bhopal should get ASAP is:
Bhopal - Bengaluru (can go via Pune to cater to it too)
Bhopal - Chennai (can go further with a halt at chennai if congestion at chennai)
Bhopal...
more... - Howrah (via DHN)
Bhopal - Ranchi/Tatanagar
Bhopal- Bhubaneshwar/Puri
Bhopal - Ernakulam/Trivandrum
Bhopal - Patna/Bhagalpur/Muzaffarpur
Terminals can be anyone as per availability but these trains should be there. Atleast treat it as a capital city. Atleast start weeklies so that in one rake 2 trains can be started.