The final news is here.
All these train movements can be seen from 1 May 2016 at PPTA.
● North East Express/12505
● North East Express/12506
●...
more... Poorvottar Sampark Kranti Express/12501
● Poorvottar Sampark Kranti Express/12502
● Dibrugarh Town - New Delhi Rajdhani Express/12423
● New Delhi - Dibrugarh Town Rajdhani Express/12424
● Seemanchal Express/12487
● Seemanchal Express/12488
● Kamakhya - Mumbai LTT AC Express/12520
● Mumbai LTT - Kamakhya AC Express/12519
.
Surprised to see PSK getting Technical Halt at Barauni.
I think, that in all probabilities none of these trains would pass via Muzaffarpur.