It appears that the 22 April flight from VABB - EHAM was cancelled. May add some credibility to the rumor.
FlightAware > Delta Air Lines (DL) #57 > 22/Apr/2011 > VABB-EHAM Flight Tracker
22-Apr-2011 A332 Chatrapati Shivaji Int'l (VABB / BOM) Amsterdam Schiphol (EHAM/AMS) 04:30AM IST 09:52AM CEST Cancelled
22-Apr-2011 A332 Amsterdam Schiphol (EHAM/AMS) Detroit Metro Wayne Co (KDTW) 11:02AM CEST 01:47PM EDT Cancelled