Who is coming again?

The closer

Rev. 1:7-8 “Behold, He is coming with clouds, and every eye will see Him, even they who pierced Him. And all the tribes of the earth will mourn because of Him. Even so, Amen. "I am the Alpha and the Omega, the Beginning and the End," says the Lord, "who is and who was and who is to come, the Almighty."
 Who is coming? JESUS. We know this because he was the one pierced and he said of himself “Nevertheless, I say to you, hereafter you will see the Son of Man sitting at the right hand of the Power, and coming on the clouds of heaven.” (Matt. 26:64) Zech 12:10 tells us they will morn for the one pierced like an only son.

Rev. 4:8 ‘The four living creatures, each having six wings, were full of eyes around and within. And they do not rest day or night, saying: "Holy, holy, holy, lord God Almighty, who was and is and is to come!”’

Again John tells us Jesus is the almighty God, for he identifies himself as the one who was and is and is to come. 

Rev. 16:5-7 we hear a conversation taking place that shows the similarity of judgments of Moses that takes place in the Tribulation period.  V.5 “And I heard the angel of the waters saying: "You are righteous, O Lord, the One who is and who was and who is to be, because You have judged these things. For they have shed the blood of saints and prophets, and You have given them blood to drink. For it is their just due." And I heard another from the altar saying, "Even so, Lord God Almighty, true and righteous are Your judgments."

 Rev. 11:16-18 And the twenty-four elders who sat before God on their thrones fell on their faces and worshiped God, saying: "We give You thanks, O Lord God Almighty, the One who is and who was and who is to come, because You have taken Your great power and reigned. The nations were angry, and Your wrath has come, and the time of the dead, that they should be judged, and that You should reward Your servants the prophets and the saints, and those who fear Your name, small and great, and should destroy those who destroy the earth."

What wrath? The wrath of the Lamb (Rev.6:16-17, which ends in the wrath of Almighty God, called Armageddon)

John says,  “And when I saw Him, I fell at His feet as dead. But He laid His right hand on me, saying to me, "Do not be afraid; I am the First and the Last. "I am He who lives, and was dead, and behold, I am alive forevermore. Amen. And I have the keys of Hades and of Death.” (Rev. 1:17-18)  

 Who died? JESUS, as a man he experienced death and was the firstborn, the first to be raised with an incorruptible body, he is the first fruits of the resurrection.
Rev 22:12-13 "And behold, I am coming quickly, and My reward is with Me, to give to every one according to his work.  "I am the Alpha and the Omega, the Beginning and the End, the First and the Last."

The one who says he is coming quickly (said 3 other times in the book of Revelation) tells us he is the the eternal one the first and the last.
 
Rev. 2:8 "And to the angel of the church in Smyrna write, 'These things says the First and the Last, who was dead, and came to life:”
 Who died? JESUS - He called Himself the Alpha and the Omega, the Beginning and the End, the First and the Last.

Rev. 21:6 And He said to me, "It is done! I am the Alpha and the Omega, the Beginning and the End. I will give of the fountain of the water of life freely to him who thirsts.”

 Who gives the water to drink? JESUS

Come to Jesus – He is the Almighty God that came to earth as man died for your sins and rose again so you might have the same resurrection unto eternal life.