Is it BioShock: The Collection or is it backwards compatibility?

BioShock: The Collection is quite possibly the worst kept secret ever. The game has yet to be officially announced by 2K, but it has made an appearance on a South African retailer's website, the Brazil Advisory Rating Board and the Rating Board in Taiwan, and most recently on the American regulatory organization's website.

Every time the game makes an appearance it is listed to release on the Xbox One, PS4, and PC. Unfortunately, 2K has not commented on BioShock: The Collection, nor have they opened up about the future of the franchise… Until today.

2K appears to be teasing some king of announcement for BioShock in a Tweet.

Good morning from Booker and Elizabeth! Hope you all have a fantastic day! It's going to be an exciting one! pic.twitter.com/8W1tvGmMCd — 2K United Kingdom (@2K_UK) April 13, 2016

Could it finally be time for the remastered version of BioShock to become official or is the franchise heading to the Xbox One via backwards compatibility?