I'd be willing to bet money Delta pulled the plug on this one, being the DIP and the loan guarantor. Only an idiot in management would put dozens of pilots through Q400 training when the Qs are gone in 3 months. Delta probably saw that and said, ahh no. Cut 'em. You'd think after 11-09 and the ensuing fiasco, 9E management would know better on how to handle pilot vacancies, displacements, etc.
Just another day at Pinchanickel.