eschatology

Does Revelation 22:5 contradict 1 Corinthians 15:28?

It appears that “so that God may be all in all” is saying “so that God alone will rule and God will rule alone”:

1Co 15:28 ISV But when everything has been put under him, then the
Son himself will also become subject t…

Who or what will the saints reign over in Revelation?

Thoughout Revelation, it is said that “they [the saints] will reign.”

For example:

Blessed and holy is the one who takes part in the first resurrection.
The second death has no power over them, but they will be priest…

When is the "last day" that is referred to in the book of John?

When is the “last day” that is referred to in the book of John?
The Rapture? The Second Coming? A series of “last days’?

John 6:39
And this is the will of him who sent me, that I shall lose none of all those he has given me, but raise them up at the last day

John 6:40
For my Father’s will is that everyone who looks to the Son and believes in him shall have eternal life, and I will raise them up at the last day.

John 6:44
“No one can come to me unless the Father who sent me draws them, and I will raise them up at the last day

John 6:54
Whoever eats my flesh and drinks my blood has eternal life, and I will raise them up at the last day.