'it may play' is correct and usable in written English.
You can use this when expressing possibility or uncertainty about something. For example, "It may play a role in helping future generations."
Although its function remains elusive, some reports suggest that it may play a role in tumourigenesis.
Its induction by MSU crystals in peritoneal macrophages suggests that it may play general roles in macrophage activation.
Indeed it may play into their hands.
"It may play well on the East Coast.
It may play a role in controlling inflammation in the airway.
Fiction, though it may play with disbelief, labors on behalf of belief.
But it has always been a little unclear just how it may play out.
And a Finnish study suggests it may play a role in reducing heart disease.
In some cities it may play two more weeks; in others only one.
"It may play better in the tabloids, but not in a courtroom".
It may play a great role in soil functioning by determining the spatial distribution of ecosystem engineers such as earthworms.
