The phrase "will be occasion" is correct and can be used in written English.
It means that something will happen or exist at a specific time or during a specific event. Example: "There will be an occasion for celebration next week when our team wins the championship."
There will be occasion later to remark on this ambiguity.
When they put their names to that, there will be occasion not just for applause but for street parties.
There will be occasion to reflect more deeply on "Klinghoffer" next fall — if, in fact, the Met staging goes ahead.
With Gergiev presenting three all-Russian concerts at Carnegie Hall in coming weeks, there will be occasion to reflect further on this conductor's political entanglements.
That will be occasion for another book to pile on the teetering Everest of volumes about that war; so many books that you would think our very lives depended on our understanding of it.
The word art is also ambiguous in another way: it is sometimes used to designate the activity of creating a work of art, as in the slogan "Art is expression," but it is more often used to designate the product of that process, the completed artwork or artifact itself, as in the remark "Art is a source of great enjoyment to me". There will be occasion later to remark on this ambiguity.
"There will be occasions when civilians will be put in harm's way.
There will be occasions where civilians will be put into harm's way.
"There will be occasions in the future for many generous tributes to be given.
Even with effective management, processes and controls, there will be occasions when traders take undue, nonclient risks with bank capital.
There will be occasions when you feel the criticism is personal and, now and then, you'll be right.
