For now only Mumbai is enough
If Bodhan - Latur Rd railway line is constructed even then, Mumbai train can be introduced but with connection of Pune via Bodhan, Latur Rd, Kurudwadi ; also to Kolhapur CSMT, Kolhapur - Vaibhawadi rail line is also under construction, then to Thiruvananthapuram or Kanniyakumari
Also an alternative route to Bengaluru/Mysore train can be introduced via...
more... Bodhan, Latur Rd, Khanapur, Kalaburagi, Guntakal