It appears the Deadly Six Edition of Sonic Lost World for Wii U has run its course in Europe. According to new listings on Amazon UK and Amazon France, the standard edition of the game is now available to buy. This edition was quietly released on January 7th and both sites have now run out of the Deadly Six Edition themselves. However, you can still purchase it via other sellers on their sites (UK, France), but it’ll cost you more of your hard-earned cash. GAME UK has also now replaced the Deadly Six Edition with the standard edition of the game.
The Deadly Six Edition still seems to be available as normal in the US, for the time being at least.