If they don't release this on the Wii U, there needs to be a serious backlash by net-savvy gamers. This project was backed for Wii U - there is no reason that they can't tailor the experience to run on the console.
Yes, it's less powerful than the PS4 and XBO, but many of my Wii U games sport the most attractive graphics of the gen (vs. my PS4 collection). The key here is OPTIMIZATION. If a developer is not ready to take some extra steps to make the Wii U work, they shouldn't promise a Wii U version.
It seems like the Wii U stretch goal is a common Kickstarter incentive these days. It's not fair to the backers who get on board later (because of that added goal), to simply fail to deliver on that. Promise something other than a Wii U release if you're not ready to go the extra mile.
Retro Tech Select - My Youtube channel. Covers throwback consumer electronics with a focus on "vid'ya games."
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