The WT org claims that the Lamb's marriage will happen after Armageddon, despite the fact that Revelation 19 very clearly says that the Lamb's marriage happens after the destruction of Babylon the Great. And that after the Lamb's marriage he with heavenly armies will go to destroy the wicked.
The WT claims that the order of events in Revelation 19 is not really in that order referring to Psalm 45. But I can't find in Psalm 45 any explicit contradiction to Revelation 19.
Paragraph 10 in the following article shows the WT org's view point:
https://wol.jw.org/en/wol/d/r1/lp-e/2014123#h=1:0-27:701
By the way, the WT has also completely misunderstood what Babylon the Great represents. You are welcome to visit my website where I try to explain these things.
The latest article there is about Revelation 19.