With the capital coming up in or around BZA,it will end up creating even more chaotic situation of an already burdened station and SC with it's plate full,i don't think either of them would want to have one more train with both stations running at saturation.I like your suggestion though,running I.C.Es for such long distances makes the maintenance an issue so a new connecting train is always 'Welcome'.I hope it can be terminated at Lingampally in case of SC and in case of BZA,i hope they start building a new one.