MTG expansion Alara Reborn rumored to be a completely multicolored set

The rumors have become one step closer to becoming a reality since WotC (Wizards of the Coast) previewed Ardent Plea, a card (well, just the picture for the card) that will be available in the next MTG (Magic the Gathering) expansion - Alara Reborn. For a couple months, people have been speculating that WotC was going to make an entire multicolor expansion considering all the emphasis on multicolor in Shards of Alara and Conflux (the 2 previous expansions). Those predictions are now one step closer to being confirmed.