"Those who demote Jesus will be in for a shock when they realise...

"Those who demote Jesus will be in for a shock when they realise that the lord of lords and king of kings is God."

If your suggesting he was God when he was here, despite his clear words in John 17:3, then I will most definitely be in shock if you can provide verses to support such a claim.

After the cross however, exalted and all, he is now ref as an only begotten God. John 1:18 = (once was not).
God under and ruling for The God, until death no more, when he then hands over the Kingdom and is then subject to the one, that put all things under him.