I doubt upscaling these games into 1080p while adding extra detail, shadowing, etc will take a long time. And this can't really hurt Nintendo's reputation when gamers have proven to be more than ecstatic for HD remakes of old games, such as God of War or the upcoming Halo Combat Evolved remake. We're also talking about potential buyers who only played 360 and PS3 games and dismissed the Wii because its games weren't in HD. These games have never been ported before so I don't see how that's an issue either.
Yah you see Nintendo WiiU could upscale the resolutions on existing Wii games without needing to remake/re-release them. It most definitly can hurt Nintendo's reputation just look how pissed gamers have been with 3DS's constant remakes StarFox64/OcarinaOfTime and then all the ports.
Also yah I have heard a shit load of upset gamers over Halo Combat Evolved's remake as well as the Sony HD re-releases. Yes some consumers are happy with them and will buy them, but they are damaging the companies reputations as I said earlier with Sega , consumers are beginning to get sick of buying the same game over and over.
If WiiU launched and even 5% of the games availible on WiiU were upscaled HD ports consumers would complain. Gamers want new AAA+ HD games over remakes. The market for remakes is smaller then the one for new games, also you are not talking actual remake like Halo's or even the HD games on PS3. "1080p while adding extra detail, shadowing, etc" Halo Anniversary is rebuilt from the ground up with Reach's graphics and physics engines. Many of the other HD versions of games were rebuilt or at least completely restructured around the newer technology offered on 360/PS3. But say the games were remade for WiiU, you'd need to implement the WiiU controller, you'd need to do a shit load more then a little shadowing and upscaling, you'd need to go into the character models and enviroments and actually rebuild them or upgrade them.
What you suggest and the OP suggests is not a simple higher resolution. It is a remake and a remake costs a lot of money and resources. As said the WiiU should be able to upscale the Wii games showing them in 1080p, I mean right now you can pirate a Wii game and play in 1080p. That is as far as Nintendo should go at least for now.
Nintendo should not invest any resources in re-making any titles in HD. Maybe next generation when the technology is drastically better then a remake might be useful. But when you can put the original Wii disk in your WiiU and play it in a higher resolution I see absultely no need to invest millions or even hundreds of thousands on remaking them!
"In God We Trust - In Games We Play " - Joel Reimer