The phrase "are not going to materialize" is correct and usable in written English.
You can use it to express that something is not expected to happen or come to fruition.
Example: "Despite the initial excitement, the plans for the new project are not going to materialize due to budget constraints."
Alternatives: "will not come to fruition" or "are unlikely to happen."
But even though the airlines are going to prevail, for the simple reason that alternative means of getting from Chicago to Atlanta aren't going to materialize, one likes to think that protests can make their way to the hearts and minds of management.
Valuations of REITs much beyond where they are today anticipate a resumption of activity that is not going to materialize for at least 12 months, while the debt service and the rents under pressure are the harsh reality today.
"A lot of these comic-book movies are world-building, and without a clear idea of what the movie is really saying, it's not going to materialize according to your expectations.
Their loathing of the status quo is such that they may well stick with Trump even as it becomes increasingly obvious that his promise of salvation ― an America made "great again" ― is not going to materialize.
There isn't anything wrong with recognizing, even embracing, the realization that Mr. Right isn't going to ride in and swoop you up (or at our age, strain to lift you out of your chair), or that your dream of starting your own wildly successful business isn't going to materialize.
Mr. Ruskin, the detective, said none of his clients' security fears had materialized, though he was quick to add: "That doesn't mean it's not there and it's not going to happen".
"Last time, they took promises of reforms, but they are not going to do that again, because two years later the reforms have not materialized in any real way," Mr. Lobel said.
"We are not going to bet the future of this province, the future of this important industry and jobs for Saskatchewan people on jobs that may not materialize".
