DL/NW Single Operating Certificate

DL/NW are planning for their Single Operating Certificate on December 31, 2009.

http://www.airliners.net/aviation-fo....main/4628578/

Now im hearing that Delta is likely to keep the DC9-30/40s till October 2010.. Does that mean they will be painted in DL colors or Hybrid perhaps?

I have heard that DL will keep NWA colors on them since they will be retiring them in Octover 2010, not worth the money to repaint all those planes just to retire them soon after.