This would definitely be the biggest hurdle for Rockstar. I wonder if mandatory installs are possible on WiiU. Obviously the game(s) would have to be labelled as needing "x amount of HDD space". I just don't think the console was designed with installs in mind at all which is strange considering how many third parties were on board prior to launch.
You could include some data on a small USB drive to mimic an install, meaning every WiiU could run it, but that would throw the economics off even further. Could be done, though ...
I really don't think it's all that expensive to port PS360 games to WiiU (esp as most third parties use C level / outside / mobile development houses to do it. Ubisoft CEO Yves Guillemot said that a typical port costs just $1.3 million. If we up GTA V's budget to $2 million the game would only have to sell around 75 000 copies on WiiU to break even using the $27 per third party sale publishers receive rule.
Something seems off about those numbers. If 75,000 sales were breakeven for a $2 million project, then 1 million sales would lead to 'mad profitz' for even a $20 million project. And stuff like Bioshock infinite wouldn't be seen as a commercial failure with several million sales under its belt.
I suspect it's rather harder to make profits than simple maths would show ... and GTA would probably a big bugger to port. The testing work alone would be a huge undertaking, and you couldn't combine costs with PS360 testing.
The development costs of GTA 5 would appear to be staggering, but as R* are cagey about costs we don't have any official figures to throw about.
I struggle to understand why Nintendo don't just pay for the development of certain big name third party ports if all it would cost them is a few million dollars. Surely having the likes of GTAV, Destiny, Tomb Raider and MGS on their system would drive several million hardware sales.
I think Nintendo did try at first, offering inducements for publishers. But the sales weren't there, and the ports were normally a little inferior. Not enough to really spoil the games, but not enough to undermine Nintendo line of being way beyond PS360 in terms of capability.
I'm not actually sure how many millions of sales PS360 level ports of these games would actually drive. I guess Nintendo considered it a bigger risk than putting that money into their own WiiU games that probably would begin to drive sales to at least some extent. But this is OT, so I think we should leave this contemplation for elsewhere.