The reaction of French, U.S, and other national regulators cannot be anticipated with certainty until the deal has gone through clearances from the 40-plus countries in which both companies operate, but Wren and Levy sound all but certain it will meet with approval.
"That's a fantasy number… Five years ago Google, Facebook, Twitter didn't even exist," he said. "We have many new competitors today than we would have five years ago when someone was evaluating" the size of the market.
What about the French? It was just a few months ago that regulators there scuttled Yahoo's attempted acquisition of DailyMotion, seemingly resistant to the idea of a U.S. takeover of a French Internet company.
Levy said, "Yes we are one of the iconic French companies. We have informed all of the officials. The reaction we got from everyone was tremendous support. We don't expect the French government will have anything else but great support."
Wren was nonchalant about the overlap in client business, suggesting firewalls and conflict shops may be needed but that the companies would cross that bridge when they come to it.
"Shared clients contributed over $6.5 billion in 2012," he said. "There will be the odd difficulty we'll have to make commercial decisions about at some point. But it's not overwhelming given the size and magnitude of this transaction."
Despite those assurances, the men made few specific statements on the benefits of the deal to clients.
Wren offered, "From a client's perspective, we'll be able to do things better, faster, stay closer to what's relevant in this very changing environment, and do it in a way that I don't think we can be challenged in the way we might have been in a traditional sense."
Publicis and Omnicom used few financial advisors in putting together the deal, "frankly, because we didn't need them," according to Wren.
They used just one firm each, and credited this fact with helping keep the deal from being leaked.
Wren said his discussions with Levy began six months ago, and that Maurice was the first to bring up the idea of a mega-merger.
"Fundamental to the process was equality… recognizing that we were both representatives of many different interests," said Wren. "Probably at the very top of that list are people we employ."
He said there are no plans for layoffs.
However it's hard to imagine the companies won't undertake some streamlining of shared resources such as offshore production groups and agency trading desks. In the case of the latter, it may be that account teams will be kept in order to service existing client and agency partners, while the centralized ad operations teams experience some headcount reduction across Vivaki AOD and Accuen. (Read more on the trading desk implications.)