The idea behind a train from JU to RMM is nice... presently there is no train from JU or JP to RMM... but there a couple of issues with the route of this train as the route currently exists.
1.) The route of this train is via INDB - KNW - AK
almost 90-95% of this route is MG... and remaining is under GC... so I am assuming that if you were the RM, you would be ready to wait for another 5 yrs before launching this train via INDB - KNW -...
more... AK. If you wanted to launch this train any sooner... you might have to consider alternatives like UJN - BPL - NGP.
2.) The halt at SWM on your timetable is only 2 min. Any train heading southwards from JP via SWM requires a reversal of direction at SWM. Fast trains like 12239/40 BCT - JP Duranto and 12955/6 BCT - JP SFast have a 10 min halt at SWM where the direction of travel is reversed and Diesel and Electric locos are swapped.