After weeks of speculation, Zodiak and Banijay have now confirmed their merger, in the process creating a pan-Euro production giant with revenues in the $1 billion ballpark. The new company will now have a footprint in more than 18 territories producing entertainment, drama, factual, reality entertainment, docu-drama, children's and animation programming. Banijay owns U.S.-based Bunim/Murray (Keeping up with the Kardashians) and Stephen David Entertainment (The Men Who Bui…