If that is what you are doing, then say that is what you are doing. What you asked was what does Psalms say about Mark? And I pointed out, succinctly by asked that rather you should be asking "what does Mark say about Psalms? You did not even identify which psalm.
That aside, how in the world would you know what I am considering? Space and consideration limit us from exegeting the entire Bible.
Which came first? Psalm 110 or Mark 16:19? So not Psalm 110 is not showing light to Mark 16:19. Mark 16:19 is shedding light on what the psalmist saw and heard. It tells us that what David saw was fulfilled in Christ's ascension and that Jesus is that Lord who will have all his enemies under his feet. That he is ruling in the midst of his enemies now. His people are coming to him in faith now.
Which is to say God is the King---and Jesus is God don't you agree? And it was future when David wrote. Do you really think that Jesus is sitting down in a chair beside the throne doing nothing at the moment and since his ascension? That he is powerless? That he has not already conquered by his death and resurrection? His earthly work of purchasing redemption is finished. That is what it means by he sat down at the right hand of God. The judgement and utter destruction of the devil, death and Hades, is not yet. Because it isn't time.
He hands over the kingdom to God who is the Father (not in addition to) means the full work of the covenant of redemption is complete. Jesus was sent to accomplish this, and he both did and will.
No, it does not speak of a temporal kingdom. It does not and it cannot. Being asked by the Pharisees when the kingdom of God wold come, he answered them, "Te kingdom of God is not coming in ways that can be observed, nor will they say, 'Look, here it is!" or 'There!' for Behold, the kingdom of God is in the midst of you. (Luke 17:20-21)
And?
