I guess, this train can easily be extended to Kerala ( ALLP/ERS) via KJM or SBC or YPR with Bi-Weekly as there are only few trains from Hyderabad to TVC sabari and KCG - MAQ. The timings can be ,
SC - 19 hrs
KJM/SBC/YPR - 7 am
ALLP - 21:30 hrs
ALLP...
more... - 7 am
KJM/SBC/YPR - 7 pm
SC - 7:30 am
A sunday, wednesday start from SC and tuesday, Friday mrng start from ALLP would get good patronage.