NIWEB2,NSC, PD 06/2005, ASK TO PROVIDE MORE EVIDENCE FOR i-485

I called USCIS 2 weeks ago, inquiring how to change address. Today I got email from CRIS and was told I will be asked to provide more evidences for I-485. Is it good or bad news? what kind of evidences may be asked? if I ted the evidence, how soon I can get GC? Thank you very much for your reply.

I think NSC is touching the cases which PD is still not current. it should be a good news for us.