The Battle of Shaman Kuros[1] is the next Boss Strike event. The event should start on September 4th and if past events are any indicator it should run until the following Monday the 9th which gives us about the same amount of time as the previous event at around 120 +/- hours.
The amount of points required for each tier has been reduced but (at time of writing) the amount gained from each battle has not been increased. There also has been no word about an in guild leader board since its initial announcement.