A couple of quotes that will likely make the low churchy and existentialist Lutherans among us go bonkers.
First Luther:AE 26:247. Luther writes of the person of faith in the Galatians commentary of 1531-5:
"“The one who has faith is a completely divine man, a son of God, the inheritor of the universe."
From Gerhard in On Christ, 144. In discussing what the goal or end of the Incarnation is, Gerhard writes:
"However, because God wished out of His immense mercy to turn our disgrace and misery away from us, to join us to Himself again, and to restore to our possession the goodness that was lost, He used this manner and means: that He personally united His Son with our nature that we might in turn be joined to God through Him who touches us by kinship and nearness of the human nature." Gerhard then goes on to cite Irenaeus: "Because of His immense love, the Son of God became what we are, to perfect us to be what He is. He became a partaker of our nature to make us sharers in the divine nature."
Hence Gerhard views the true goal of the Incarnation as being what the Patristic theologians referred to as theosis.
Update: Just to clarify, this does not mean I am even remotely interested in going EO. I think that this is the logical outworking of the Lutheran idea of the gospel is divine-self donation as it is expressed in our sacrament theology in general and the Christological doctrine of the genus maiestaticum in particular.