No rush mate, just fit it in when you can, if you even wish to.
The overall theme, on the whole, of Ch 15 - Paul comforting those that have lost loved ones, with NO hint whatsoever, that their spirit or the likes, is already in the likes of heaven, so calm down guys lol.
So, a theme there is of, a literal raising from the grave, in some form.
EX -
4 And that he was buried, and that he rose again the third day according to the scriptures:
5 And that he was seen of Cephas, then of the twelve:
6 After that, he was seen of above five hundred brethren at once; of whom the greater part remain unto this present, but some are fallen asleep.
12 Now if Christ be preached that he rose from the dead, how say some among you that there is no resurrection of the dead?
13 But if there be no resurrection of the dead, then is Christ not risen:
14 And if Christ be not risen, then is our preaching vain, and your faith is also vain.
15 Yea, and we are found false witnesses of God;
51 Behold, I shew you a mystery; We shall not all sleep, but we shall all be changed,
52 In a moment, in the twinkling of an eye, at the last trump: for the trumpet shall sound, and the dead shall be raised incorruptible, and we shall be changed.
53 For this corruptible must put on incorruption, and this mortal must put on immortality.
1 Thes 4:16,17 -
For the Lord Himself will descend from heaven with a loud command, with the voice of an archangel, and with the trumpet of God, and the dead in Christ will be the first to rise. / After that, we who are alive and remain will be caught up together with them in the clouds to meet the Lord in the air. And so we will always be with the Lord.This is definitely referencing a literal grave, from what I'm seeing.
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Now then, not that far back you said the likes of - your messenger ushered in a 1,000 year period and at the time I asked, are you referring to the Revelations mentioning of the 1,000 = I don't believe you ever got to answer that?