The joint world record holders could also meet at the Prefontaine Classic in Eugene, Oregon, on May 28 where Gatlin is scheduled to run the 100 metres and Powell the 200.
"There is at least a possibility that might change, but we want to reserve comment on that," Powell's manager Paul Doyle said.
The pair last raced on the track in London in July 2005 when Powell pulled up with a groin problem that put paid to his season.
Gatlin beat Powell in their only other meeting last year even though both clocked a wind-assisted time of 9.84.
