It says he will come in the "glory of his Father". Not as the "Father".
But... The Glory of God or Baha'u'llah is a title. Why was that title picked? What significance did it have in Shia Islam? Obviously, it's a great title to fit into the Bible and the NT.
But other people have taken "titles". Like there's a person that calls himself the "Maitreya". In fact, Baha'is claim their prophet, "The Glory of God" is the Maitreya. One of them is lying.
Oh, and another title... the "Christ". Or the Anointed One. Baha'is claim that Baha'u'llah is the Anointed One or the Christ don't they?
And some more titles... Who's this "Son of Man"? You can't say it is Jesus, because the verse you quoted would then say that Jesus will come in the Glory of his Father. And then throughout the Book of Revelation is the "Lamb" or the "Lamb that was slain". For Christians, a clear reference to Jesus. For Baha'is? Some have said it refers to the Bab? Is that official? Or just a guess?
Again, "Christ" is the same as saying the "Lord's Anointed One" or the "Messiah" But later in that same chapter it says...
27 For as lightning that comes from the east is visible even in the west, so will be the coming of the Son of Man.
Implying that when he arrives, it will be obvious and all will see. But another problem for Baha'is... It doesn't say the "Glory of God" will come. It says the Son of Man. Can you make the "Son of Man" to mean Baha'u'llah? Seems like it would be kind of hard do. Baha'is would have to make Baha'u'llah both the Glory of God and the Son of Man and the Father and the Son at the same time.
30 “Then will appear the sign of the Son of Man in heaven. And then all the peoples of the earth will mourn when they see the Son of Man coming on the clouds of heaven, with power and great glory.
So, here's more verses that say it is the "Son of Man" that is coming. Anyway, I'm sure there is a "symbolic" interpretation that Baha'is can come up with to make the Son of Man Baha'u'llah and the Father... So, if you got 'em, let's hear "em.
Those are very good verses for Baha'is. But there are still all those verses that talk about the "Lamb". And making the Lamb the Bab is kind of a stretch. The Lamb fits Jesus very well.
But... one more problem... For Baha'is two Manifestations came before Baha'u'llah... Muhammad and then the Bab. For me, the Baha'is interpretations of verses in Revelation, that they say refer to Muhammad and the Bab, are very weak. The "Two Witnesses" being Muhammad and Ali. Then the "Three Woes" being Muhammad, the Bab and Baha'u'llah.
Also very weak is the Baha'i attempt to make six different events that begin and end at different times all to have started at the same time 622AD, and ended at the same time 1844. Then along the way Baha'is make the Islamic dynasty of the Umayyads the beast.
Then Revelation ends like this...
Rev 22:16 “I, Jesus, have sent my angel to give you[
a] this testimony for the churches. I am the Root and the Offspring of David, and the bright Morning Star.”
17 The Spirit and the bride say, “Come!” And let the one who hears say, “Come!” Let the one who is thirsty come; and let the one who wishes take the free gift of the water of life.
18 I warn everyone who hears the words of the prophecy of this scroll: If anyone adds anything to them, God will add to that person the plagues described in this scroll. 19 And if anyone takes words away from this scroll of prophecy, God will take away from that person any share in the tree of life and in the Holy City, which are described in this scroll.
20 He who testifies to these things says, “Yes, I am coming soon.”
Amen. Come, Lord Jesus.
21 The grace of the Lord Jesus be with God’s people. Amen.
Nothing about the Son of Man, or the Lamb or the Glory of God or a new name... It's all about Jesus. It says, "I Jesus". I am the Root and Offspring of David. "Yes, I am coming soon." And who is this "I" In verse sixteen it says it was Jesus. And the writer seems to think it was Jesus when he says "Come, Lord Jesus."
So, interpret away. Show me the Baha'is interpretation to these other verses that seem to point to Jesus.