rebellion and lawlessness

2 Thessalonians 2:1-4

Paul is addressing a false teaching, supposedly coming from him, which said that the Lord had already returned. Paul assures the church that the teaching did not come from him and that it is false. He reminds them that Christ will not return until the rebellion occurs and the man of lawlessness is revealed. He gives no further information about the rebellion which causes me to conclude that it was common knowledge to the people of that time. He does give further information about the man of lawlessness: he will claim to be God, settining himself up in the temple of God.
This raises several questions for me: how literally are we supposed to take this passage? Does the man of lawlessness literally set himself up on the temple of God? The plain reading of this passage would indicate that Paul is talking about the temple in Jerusalem but that means that for Christ to return, the temple has to be rebuilt. I've always been taught that Christ's return was imminent but the temple is no where close to being built. Is Paul talking about another temple? Is the "day of the Lord" referring to something else besides the return of Christ? I don't think that's the answer since it is linked directly to the "coming of our Lord Jesus Christ and our being gathered to him" (which sounds a lot like the rapture).
In my dispensationalist upbringing, the gathering of the saints takes place about 7 years before the literal thousand year rain of Christ. So, Christ comes and gathers his followers, taking them to heaven which sets in motion the Tribulation. Then the man of lawlessness is revealed, the rebellion occurs and, at the end of the Tribulation, Christ returns with his followers to defeat the man of lawlessness and his armies. However, Paul seems to see the two (Christ gathering the saints and the day of the Lord) as one and the same.
I don't have a lot of answers here. However, I would say that the theology of end times that I have been taught bears a second look.