If you've looked at the eShop page for Darksiders 2 on your European Wii U accounts today, you might have noticed a notification that March 31 will be the last day that anyone can buy the game digitally. After that, previous purchasers can re-download, but otherwise it will be gone. There is no similar message on the N. American shop. RIP THQ, again. This may be temporary, as Crytek will attempt to buy the franchise rights soon.
Thanks, Nintendo Life