X-Men: Apocalypse is a novel.
 The sole clear case in the Jewish Bible (Old Testament) is chapters 7-12 of the Book of Daniel, but there are many examples from non-canonical Jewish works; the Book of Revelation is the only apocalypse in the New Testament, but passages reflecting the genre are to be found in the gospels and in nearly all the genuine Pauline epistles
X, or x, is the twenty-fourth and third-to-last letter in the Latin alphabet, used in the modern English alphabet, the alphabets of other western European languages and others worldwide

