The phrase "a vast stage in" is correct and usable in written English.
It can be used to describe a large or significant context or setting in which events or actions take place.
Example: "The conference served as a vast stage in the ongoing dialogue about climate change and its global impact."
Alternatives: "a grand arena in" or "a significant platform in".
At 1,000 acres comprising most of the town's northwest municipal district the facility offers "the state's most comprehensive advanced and specialized training programs" for law enforcement, a vast stage where officers-in-training play out every disaster imaginable.
Knowledge has increased concerning the fact that a plant does not act as an individual on its own, but as an actor in a vast stage populated by bacteria, fungi and other microorganisms [ 1- 3].
One moment you feel you could be watching something in a tiny studio space, then, suddenly, 40 extras are creating a vast stage picture.
Jan Versweyveld's set, on a vast open stage in the courtyard of the Lycée Saint Joseph, resembles a recording studio, with video artists and musicians performing and live-mixing in plain sight.
ON Sept. 13, 1994, Luciano Pavarotti and Bryan Adams stood side by side before a symphony orchestra assembled on a vast outdoor stage in Modena, Italy, Mr. Pavarotti's hometown, and they performed a duet of "O Sole Mio".
Ushuaia — a lush Vegas-like hotel complex where the DJs play on a vast outdoor stage in front of a swimming pool and everyone looks as though they've walked off the pages of How to Spend It — put on a great opening party with underground talent ranging from the Martinez Brothers to Miss Kittin to Szczecin's Catz and Dogs.
His body was diminutive in comparison with the rest of the vast stage, which in turn became something of a canvas or a movie screen, amplifying the notion of the individual against the world.
Liberty sees an opportunity, a place on the vast stage that is college football, which is something akin to a religious experience in America.
