The phrase "a forthcoming exhibition" is correct and usable in written English.
It can be used to refer to an exhibition that is scheduled to happen in the near future.
Example: "The gallery is excited to announce a forthcoming exhibition featuring local artists."
Alternatives: "an upcoming exhibition" or "a soon-to-be-held exhibition".
The entrance hall has been transformed into a seductive garden of the plants she is preparing for a forthcoming exhibition.
As a forthcoming exhibition of her work at Tate Liverpool hopes to demonstrate, she was an experimenter in many media.
The first is a forthcoming exhibition, at Gitterman Gallery, of pictures by the photographer Josef Breitenbach (1896-1984).
A forthcoming exhibition at the Royal Academy of Arts is to explore the role of gardens in painting, with Monet among the most prominent artist-gardeners.
Yesterday we ran a story about a forthcoming exhibition at the Ashmolean Museum in Oxford, headlined "Byzantine 'self-assembly' church to be reconstructed in Oxford".
But there's always a comedown: Mr. Scharf said he was considering making his next party, on July 2, his last, so he could work on a forthcoming exhibition.
These themes are also the focus of an forthcoming exhibition with the same name.
The American dream is at the core of a new, forthcoming exhibition opening at the Guggenheim museum in New York City, the first American survey of Vietnam-born Danish artist Danh Vo on 9 February, entitled Take My Breath Away.
"We will make the manuscript available to the general public, who can come and see it as early as this autumn, when The Watsons will be a star item in our forthcoming exhibition, Treasures of the Bodleian".
Among the exhibits in the forthcoming exhibition will be the travelling bag that Dickens took on foreign trips.
But a series of recent openings (and forthcoming exhibition closings) makes the next few weeks an ideal moment to check out Motor City's burgeoning design scene.
