He appears to be open to the possibility.
In a post from the Costa Rica news outlet La Nacion, D.C. United forward Alvaro Saborio hints that he could be returning to Saprissa in the Ticos' domestic league in 2017, categorizing a return as "... a high possibility."
The report goes on to claim that talks have begun with Saborio, who signed a contract extension with the Black-and-Red last year (though seemed to admit news of it a month before it was made official), and the report does mention said extension has an option for 2017, though based strictly on the nature of the article, it would presumably be a club-held option.