Not sure what is so hard about that?
Here are a few prophesies from Revelation 22: in fact 10 prophecies (depending how you count them).
3 And there shall be no more curse: but the throne of God and of the Lamb shall be in it; and his servants shall serve him:
4 And they shall see his face; and his name shall be in their foreheads.
5 And there shall be no night there; and they need no candle, neither light of the sun; for the Lord God giveth them light: and they shall reign for ever and ever.
So I expect that in the city there will not by any curse, God's throne will be there, God's servants will serve Him, and they will see His face, etc. Just like the text says . . . I fail to see what is hard about that ??