i think there will be no reversal at rewa , also very little chances that there will be reversal at mirzapur also . if reversal happen at any of these 2 then the utility of this line will not be optimum . Also i don't think at MZP any space for expansion of station area same with vindhyachal . There is a lot of space at chunar but by this mirzapur will be skipped and on positive note MGS-STA distance will be reduced by 50km minimum . Also i read some where that Some part of rewa singrauli will be used in rewa mirzapur line i.e. sidhi will be junction point rewa/singrauli/mirzapur . The route will be like mirzapur - lalganj-hanumana-SIDHI-govindgarh- rewa .