In the forbes article:
"UPDATE: Eurogamer has a more extensive look at the Wii U and has a couple comparison screenshots for Batman: Arkham City. There are some definite, though hardly revolutionary, improvements in the shots over their current-gen counterparts."
http://www.eurogamer.net/articles/digitalfoundry-vs-wiiu-e3-2012
They explained in the article the improvements over the HD twins. Not extremely big but still noticeable. They also mentioned the Wii U version of Batman have Anti-aliasing:
"We're also fairly sure that the basic console 720p presentation has been augmented with FXAA or some equivalent post-process anti-aliasing, which is present in all the gameplay clips, but disabled when "detective vision" is in play. The PS3 and 360 versions feature no anti-aliasing at all."
In the AC article:
"Masters says that the Wii U version is “99% identical” to the other consoles."
Most likely because of time constraints.
Nintendo and PC gamer
