According to Delta.com:
Your SkyMiles are secure – The award-winning SkyMiles program has not been affected, and you can continue to enjoy the program’s benefits—including Delta Crown Room Clubs®, double miles on qualifying purchases with the Delta SkyMiles Credit Card from American Express, and the opportunity to earn and redeem miles on the thousands of flights offered by SkyTeam and our vast network of global airline alliances.
of course they say that now....any changes beyond those already put into place in the last few years will be rolled out quietly....that said, the FF programs are probably the last thing to get touched, as they have the effect of marrying travellers to one or two airlines. If you divorce your passengers, they might just decide to get an AA FF card...