I don't think CR will allow this. Because Pune- Mumbai line is already full & no new trains are being added in this section. If u also look at the number if trains introduced in this sector only Pune Bikaner & CSMT Solapur have been introduced.
We can route this through SBC--DVG--UBL--LD--MAO--PNVL as there are no trains from SBC to MAO--PNVL.