RailFans don't miss their train. Why? Because they go to the station HOURS before the actual departure of their Train - to watch OTHER trains depart. - Prince Maan

Likewise :) !
I suppose the boarding point might be shifted from Anand Vihar Terminus to New Delhi,therefore shedding of doing crucible stuff such as rake reversals at Sahibabad.Another seaworthy alternative could be to make Old Delhi but chances of that being implemented seem really dim because afterall these are stout Double Decker coaches we are gossiping about isn't it...furthermore Old Delhi is sort of amish and over-saturated when it comes to Premium trains.
One more point I would like to demonstrate is the timing issue-
LJN...
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DD reaches ANVT by 1pm approx and JP DD departs DEE at 5.30pm.So such a massive amount of slack will obviously be unsolicited.I better probe that either the time of the former will be pushed by a pile of 2-3 hours or the latter will be making it upto Jaipur by 7.30-8pm.On the other hand if this train becomes the seed for the principle of the proposed overnight Double Deckers then I'm afraid this train will be operating in the slot of Ajmer Shatabdi and Lucknow AC Express