Data miner's looking through the latest patch for Blizzard's Overwatch have discovered things which would indicate that a free trial of the game may be on its way.
Three strings have been uncovered in the patch, which are "Sorry, the Overwatch Free Trial is not available at this time", "Group members using trial cannot enter competitive play" and "Not available for trial".
Although these could just be left over from when the game was considered to be free-to-play, it could also indicate that a free trial mode is coming to the game. Other Blizzard games have free trials, for instance, so it wouldn't be unreasonable to think that they may do the same here.