Dunno if this qualifies, not a dream that literally became true in the details, but . . .
I used to have a recurring dream. I dreamed I was the new owner of a house, usually a ramshackle old shack about to fall down. There was a feeling of sadness to the dream. But nevertheless, some friends and I would go in and start exploring my new home. Eventually, I would discover a secret door -- under the satirs, in a basement wall -- and open in. Stairs would lead down to a large chamber below. An virtual palace awaited me there! Always a huge room with other rooms leading off, once it was a great hall full of tapestries and gold appointments and a banquet laid out, or a room full of band instruments and uniforms (I was heavy into music that time in my life), but always a discovery of great wealth. And I'd be ecstatic at discovering a treasure beneath the hovel I'd bought. Then the real estate agent would show up and tell me "this part of the house was not included in the deal." Then the sadness again. And I'd wake up.
Reading some books on dream interpretation, I came to realize that the ramshackle house represented me -- appearing on the surface to be worth little or nothing, but hiding a treasure beneath. But that treasure was always being denied to me, apparently by those around me who seemed to be in authority and "in the know," but weren't really. About 13 or 14 years ago, with the help of close and long-standing friends, I began making changes in my life and changed my attitude about what I "should" be striving for. I finally found that treasure within me -- not necessarily gold or riches -- but contentment, peace and pride. And I haven't had that dream in over a decade.
Literally a case of dreams coming true!