What do you mean the disciples that slept/died until the resurrection that would occur at the consummation of the new covenant?
You are hinting that the founding disciples that died before, on 70AD, where you place the consummation, still fell under the old covenant.
the disciples fell into the most unique time in history,, a period of time where two separate worlds existed and overlapped each other (OC world system and NC word). This 40 year period was the NC saints temporary wondering in the wilderness for 40 years just like the jews of Old wondered in the wilderness for 40 years at that time of the Old Covenant.
the disciples lived in an Already/Not yet time paradigm. the OC was still standing and the NC was in the process of fully bursting fourth.
Heres a biblical example that may help this amazing time in history.. in the OC once per year atonement was made for all the people of Israel by the high Priest. the day of atonement,, the ONLY day in the entire year where the high priest only entered behind the veil and went into the Holy of Holies in the presence of God.. He was to make sacrifice and offering for the sins of the people IN CLEAR view of the people at that altar,, this sacrifice (like christ's) was in clear view,, this is the 'first appearing' of the high priest, then after the sacrifice the high Priest would then disappear from the presence of the people with the blood of the sacrifice and he would ascend behind the veil, into the holy of holies in the presence of God, where the blood would be either be accepted or not accepted by God.. the high priest is performing this work on behalf of the people, the work of the ministry before God, , while the people eagerly awaited, on the other side of the veil (on earth), to see if the high Priest would 'appear the second time', announcing salvation and that God has accepted the sacrifice and had indeed forgiven our sins..
this is all taught in the book of Hebrews..
The point is that Jesus did this work as high Priest just like the high priest of the OC did,, he appeared before the people, made the sacrifice in public display, then he ascended into the holy of holies of heaven where he would perform the work of ministry on behalf of the people,, while the people, the disciples, were eagerly awaiting the high Priest, Jesus', second appearing out of the vail announcing that salvation has come.
The disciples lived in this 40 year time period when Jesus as high priest was behind the veil,, his Parousia was the 'second appearing' which brought resurrection and salvation to all who were eagerly waiting for him,, either alive or asleep.
hope that makes sense in regards to this unique time when the disciples were in between two worlds.
I will answer your other question in a separate post.