Here’s my own position (at least as of today!):
If (1) Paul can say that “in hope we were saved,” when “save” (sozo) language is always, even there, future in orientation for him, and if (2) future salvation includes glorification, then he could quite plausibly mean in saying “those whom [God] justified [God] also glorified” that believers were glorified in hope, that is, they were and are partially and proleptically saved/glorified in the initial and daily reality of justification, that is, of dying with Christ and rising to new life in Christ. Of course that new life is always in the shape of the cross!
If this correct, then the term “theosis” to describe what Paul is describing is quite appropriate—a process of being formed into the likeness of the Son of God, though in this life the “glory” is partial, proleptic, and cruciform.
One possible problem with this interpretation is connecting it to the liberation of creation. Is there any sense of proleptic salvation for the creation in Romans 8? Or could there be, implicitly?
(This post is expanded from a comment I made on my previous post on this topic.)