Q.  What explanation will be given for the Rapture? 

A.  Whatever explanation is given, it will be THE LIE:

2 Thessalonians 2:9-12 ~ New International Version (NIV)

The Man of Lawlessness

⁹ The coming of the lawless one will be in accordance with how Satan works. He will use all sorts of displays of power through signs and wonders that serve the lie, ¹⁰ and all the ways that wickedness deceives those who are perishing. They perish because they refused to love the truth and so be saved. ¹¹ For this reason God sends them a powerful delusion so that they will believe the lie ¹² and so that all will be condemned who have not believed the truth but have delighted in wickedness.