Supposedly, DL is saying Song will remain intact w/ the current fleet and routes through May. Given that summer is a peak travel period and it doesn't make sense to take aircraft out of service to reconfigure them during the summer, it is doubtful that any significant changes will happen before the fall unless some aircraft can be reconfigured in May. I would expect that some of the current Song aircraft will be moved to other non-Song routes in the summer, however.