The Bioshock Collection might be real after all, as the Brazilian classifications board has rated the game for PS4, PS3, Xbox One, Xbox 360 and PC. The collection was initially revealed by South African retailer Raru a few months ago.
Although the ratings board doesn't reveal what is included in the collection, it will most likely include remastered versions of BioShock, BioShock 2 and BioShock Infinite. 2K Games has previously said that it "doesn't respond to rumours or speculation".
If this collection is indeed going to be released, we can probably expect an official announcement soon.