This winter, the Halo World Championship will begin, allowing players to compete for more than $1 million in prizes. The Halo series has also attracted a large online playing crowd of competitive players, and now that is being fully embraced. Halo 5: Guardians will be the focus of the competition, as it will use a "hyper-competitive Arena multiplayer experience" for the players involved.
Details surrounding the competition and prizes are scarce right now, but there is a website set up with some additional information, as well as the official Halo World Championship trailer which is below.
More details about the Halo World Championship