I don't think there are any plans in change of ownership. SAS still has a lot of issues to deal with before someone like Lufthansa would be interested in taking over.
Regarding the fleet there is longterm plan for replacement of MD80s, B737classics, F50s and A330/A340s. I think the Fokkers are beeing replaced by Wideroe very soon?!..
I could see SAS ordering more A319/A321s for CPH and B737NGs for OSL & ARN. Maybe also some CRJ900s for regional routes. The longhaul fleet needs be replaced more efficient aircrafts like A350 or B787 to be able to compete internationally. BUT, the current situation is that they don't have the founds to order that many new planes...