The merger of WPP and STW in Australia creates an $850 million business. It dwarfs the nearest competition by a long way and CEO of the newly formed WPP AUNZ, Michael Connaghan, expects it to punch through $1 billion before too long. With more than 90 agencies in the combined business, consolidation is inevitable. Connaghan said as much, speaking to AdNews just hours after the merger was passed by shareholders