I recently read Gregory of Nyssa's In Illud: Tunc et Ipse Filius. It is a short but fascinating piece on 1 Corinthians 15:28.
“Then the Son will be subjected to him who has subjected all things to himself.”
This was a text that some were using to argue that the Son cannot be equal in divinity to the Father, because he will be subjected to the Father.
Gregory's response, following Origen, is that the Son here is submitting to the Father as a human being; indeed, as the representative human being. As such, his submission to the Father is a submission to God on behalf of all humanity, nay, all creation. Creation submits in Christ's own submission. And so, when creation is subjected in Christ, God will be all in all.
I think that this is exactly right—not simply as a quirky-but-interesting later spin on the text. I think it is what Paul is getting at.
Given that, it is perhaps not surprising that 1 Corinthians 15:28 was the most commonly appealed to text among the early Christian defenders of apokatastasis.