HNNNNGGGG so delicious! Can't wait until they go back to Johto again, it might be possible...They never said the anime itself was done or Ash & Co. mainstays, just that DP series will be done.
HG/SS has been out too long in Japan for a return to Johto to make sense now. It's more likely Pokemon Black & White will be the next subject, since it's due to come out later this year.