10...
That's the amount of people willing to go as far as downloading a 25GB game, WiiU games are encrypted so there's no way of removing the dumb data from the discs. (this method can only use physical backuped discs and not size efficient eShop downloads since they are encrypted) Every torrent would have to be the same size as a Wii U disc.
Not to mention the other hurdles like having to purchase a WiikeyU, open the console, install it, copy games, compatibility issues etc.
No way piracy will be mainstream like with the Wii/DS again, I mean those system were so easy to pirate games for even my grandma could do it.
25 gigs is not that much, plenty of PC games are that, a whole 24 episode TV series with 1 odd gig high res episodes..., PS3 games touch upon that, there are a few multi disc 360 games that hit that and standard 360 games are not exactly orders of magnitude smaller.
Still 25 gigs. I will assume 25000 megs
1 meg a second connection is nothing major in a lot of Europe, Japan and North American cities so 25000/3600 is just shy of 7 hours or basically nothing worth worrying about. Doubly so if seedboxes, torrent/usenet enabled NAS boxes and other such systems exist and are available for home use.
Also scrubbing methods do not necessarily need a key to function either and if it is just padding in places it could be detectable later but it could also be just that and easily removed.
Easy to do.... most drive emulators amount to extract/copy the file to the drive in a given directory. Maybe split up if you are using a limited filesytem. Compatibility issues, though they could arise, are usually something of a nonissue as well; if you can emulate the drive well enough for one game chances are you can do all of them and almost certainly all released in a similar timeframe or before it.
"purchase a WiikeyU, open the console, install it"
Are these the very same people that ordered their own flash carts before? Or get the neighbourhood tech to source and install like they do for everything else. Install it probably amounts to "remove a few removable clips, insert new wires in same shaped holes, put it back together.