I don't think so. I remember reading on multiple occasions (most recently, about two or three months ago) that "Mark Zuckerberg is preparing a dislike button",

I don't think so. I remember reading on multiple occasions (most recently, about two or three months ago) that "Mark Zuckerberg is preparing a dislike button", when, in fact, he was referring to adding more buttons to use in situations where "liking" things is not appropriate. This change brings just that.