Joystiq reported on this as well.
They are good with retractions labeled "updates" usually. But they haven't done so here. and if there is any misrepresentation, I would be surprised that UBI wouldn't want to correct that.
And yet, I do feel that there may be some truth to Zombi U profit struggles, but it has nothing to do with how many copies were sold. I imagine it was a fairly healthy sell-through.
But the problems are the fact that it started as a game for the Xbox. with little alien things... that costed money that was not recouped. And then they shifted development gears to get it rolling on Wii U. that costed money too. Then, they decided it should be a Zombi game, based on an old UBI IP. so they had to created new models, new assets, new audio, new CGI, etc. Then it REALLY cost some money.
In all, they made a game, a port, then another game. that's like 2.5 times the cost of what it would be if they just developed a zombie for the Wii U from the start.
Whether or not UBI feels Zombi U profited or not is unclear at the moment. However, once thing for sure is that they are looking at the wrong culprit if they are eyeing the Wii U. It was their own development path that had the game possibly costing over twice as much to make as it should have.