What happens to common stock shareholders when a company gets delisted?

To get to the point, I invested ~$2k into Fannie Mae back in 2008 when the government announced that they will not "let it fail." So I bought it, not knowing that they were planning to nationalize it. When it was nationalized, I kept it, hearing that in a few years, the government will let it go public again. And today, 2 years later, they announced that they plan to delist themselves from NYSE. So, bottomline, what happens to me, and does this mean that it's "gone" with no return?