Honestly guys do you really think theres going to be nothing. Eventually as we progress and advance in level, and the dreaming city changes, there will probably be new rewards coming out of the woodwork. Especially in the Blind Well. Out of the previous arena experiences in Destiny, The Blind Well is most similar to the Court of Oryx. We may yet see collectibles associated with it, maybe an armor set, an exclusive weapon. Maybe even part of the Thousand Voices and Wish Ender quests. Since we don't have artifacts anymore, we could see exclusive ghosts and other vanity items.