My understanding is that the guidelines for "2015 entry to practice" will totally allow for grandfathering. You should have no problem (I am assuming you have secured a Masters and that you are not practicing with a certificate - I am unclear with regards to that scenario). The idea of the position statement is clearly not to restrict current practitioners, but to provide a terminal degree that is front line and practice-based that focuses on professional leadership in terms of advocacy and health policy, academics, and systems management; where as the PhD is geared toward research concerning the synthesis of new knowledge.
Feel free to contact me with any questions regarding the DNP that I may be able to assist you with
Respectfully
Faith Claman, DNP, RN-C, WHNP, CPNP