The official WWE 2K Twitter account just confirmed, by answering a fan's question, that this year the United States won't have a Collector's/Special Edition of WWE 2K16.
"@jthawley06 There will not be a special edition of WWE 2K16 in the U.S. this year. Pre-order #WWE2K16 at wwe.2k.com"
— WWE 2K (@WWEgames) August 19, 2015
As for the other countries, it was announced before that Germany will have a Steelbook Edition of WWE 2K16, available at this LINK on Amazon.de.
Nothing has been said about UK, Canada and the rest of Europe. We will keep you updated as soon as we will have new informations.