Narmada Express is there to cater Indore/Ujjain right now. And a New train is required, Amarkantak already have a huge load of passengers, if this will get extended then the rush will increase. Better to start a new train from Indore to Bilaspur via JBP-NIR-G so that newly GC section will get connected to BPL and INDB and this new train can ease down the pressure on Amarkantak and Narmada Express.