Apparently the rumors about a BioShock collection might have a measure of truth to them. A website for “Bioshock The Collection” briefly appeared on 2K’s domain, only to be quickly removed shortly afterwards.
Below you can see the whole content of the site. There literally was nothing else on the site proper, but the box art was also hosted on the same server. You can check it out at the bottom of the post. Judging from the illustration, it appears that the collection will include BiosShock, BioShock 2 and BioShock: Infinite.
At this point, all we can do is to wait for the official announcement and details.