Fate's Authority "What If?"
The purpose of this is to explain alternate ways the story could've happened if Sam had made different choices at different points in the story which affect the future. As such, these stories tread WAY into spoiler territory so they won't be released for a while. Until then, please enjoy this photo I found of a baby duck.
By the way, most "Ifs" are technically canon, if that doesn't make sense to you then it will later in the story