It was officially announced in Interim IR Budget 2014 Speech by Mr. Kharge from Howrah but now IR has stated the ER Terminal as Sealdah in TAAG 2014 for this train as Howrah may have been extremely congested for accommodating this train.... if IR finds Sealdah also over-crowded then ultimately this train "may" be shifted to Kolkata-Chitpur (KOAA) Terminal as it's not so crowded as yet... IR had done a similar abrupt change earlier also of converting 2277/2278 KOAA-ASR-KOAA Duronto Express to 12357/12358 Superfast Express much before it's inauguration :-(