I actually think this could be a hd remaster. If these people were clueless as many on neogaf claim then wouldn't they not even know of the connection between X and xenoblade? Xenoblade is already a very nitch title only the hardcore are aware of. Some non gamer worker responsible for putting these listing ups wouldn't have any idea about any of this. If they needed a placeholder for X, why couldn't they simply use the title "X" like they usually do with every other anounced game? Just go with the tentative title. Using the title Xenoblade WiiU will just mislead customers who also might not know the connection between the two games.
All in all, I think this could be the real deal. Given the barren wasteland that is the WiiU software and release schedule, I can see Nintendo pulling the trigger on this as a quick release to fill in the gaps for the time being. If Mono developed this game with higher res assests during developement and just downsampled everything to Wii's output (don't qoute me on this, taking a complete shot in the dark with this assumption as I've heard somewhere that developers sometimes do this) then maybe it wouldn't take another smaller company to much time to push out an HD version for WiiU. What does everyone think ? (specially those of you with more industry knowledge) How long would it take to put out an HD version of this and not of the Wind Waker remaking type, just a straight HD port?