I never understood why some publishers even released ports of older games anyways. ME3, Arkham City, etc. I understand BLOPS2 and AssCreed III since those are new and there's demand for them, but it doesn't make sense releasing such old games that everyone who wanted to play them has already played.
On one hand, it may be a bit of an assumption that everyone who wanted to play them already has. I know it's hard to conceive for the GAF audience, but there may be an unknown number of upgrading Wii owners who didn't have one of the HD twins. And so may be interested in famous games like Arkham City.
On the other hand, it could just as easily be a relatively cheap, disposable way to test the Wii U market for so-called hardcore games. From the publishers perspective at least, which doesn't have to many any sense. (Given how little sense some publisher decisions make.)
Ultimately it could just be about image. Wii U launching with a stable of "competitive" games is a very different situation from Wii's launch, where it was outclassed on day one by having zero games that the other hot consoles were launching with. The maturation of the game market and the length of this generation may theoretically provide Wii U a bit of a boost there. As seen over Black Friday, the 360 is still selling plenty of consoles. It's still a hot item, its big games still pretty major releases. Whether or not it does any good in the long term, the strategy surrounding the U feels as if it's banking on using at least a limited window of (general) software parity to establish Wii U as a console on equal footing with the other brand labels.
Personally, I also do believe that some 3rd parties may be sincere when they say they want Wii U to succeed. The only truth I think there ever was behind the conspiracy theories surrounding 3rd parites hating Wii, is that Wii caught everyone totally offguard. And 3rd parties may have wished that they wouldn't have to completely stop, spin, and retool to deal with this new reality. By contrast, we're at the tail end of a generation that's been very hard on many, and resulted in a lot of uncertainty about sustainability. It could be that some publishers DO wish Wii U will become somewhat as big as Wii was, so that there's a viable alternative platform to the Super HD Twins... in case cost increases do run out of control and bite everyone in the ass. I have to think some execs see in hindsight that they left money on the table with Wii, that a few companies like Ubisoft capitalized on.