Peacefulpete....I think I was attending more to the Dutch radical view which you've mentioned previously than your current thinking. I agree with much of what you just mentioned. The theme of a delayed return is much more in line with such late post-Pauline writings as 2 Timothy 2:18 (disputing the notion that the resurrection has already occurred), the post-Johannine appendix in John 21:23 (disputing the rumor about John not dying until Jesus' return), and the reference to the "long wait for the Day of God to come" in 2 Peter 3:12. I also agree about the mention of Pauline pseudepigrapha in 2 Thessalonians 2:2 is probably an attempt to deflect suspicion about the work itself -- confirmed in the exaggerated attempt to assert Pauline authorship in 3:17, which is reminiscent of the continued attempts by Pseudo-Peter to assert his Petrine identity in 2 Peter: "Yes, I am SIMEON PETER, not just Peter (1:1, compare with 1 Peter 1:1), and I was indeed the Peter that was martyred (1:14), and yes my martyrdom was prophesied by Jesus (1:14, compare with John 21:18-19, which wasn't written until the second century), and yes I was the very one who witnessed the transfiguration (1:17-18, compare with Matthew 17:5), and I acknowledge I already wrote that other letter you all know (3:1), etc.," despite that fact that the Peter of 1 Peter makes no such strenuous attempt to assert his identity, and despite occasional slip-ups (like the reference to "the apostles" as those in the past in 3:2 or to the time passed "since the Fathers died" in 3:4 or reference to Paul's letters as "scripture" in 3:16, etc.). Anyway, I know you don't disagree on this, so I digress....
The issue of a pre-Christian or at least pre-John precursor of Revelation is itself a fascinating subject, considering the composite nature of the book and the relevance of the language to the events of Caligula's and Nero's reigns. I am most interested in the connections between Revelation and John the Presbyter's other chiliast expectations and 2 Baruch -- which anticipates certain key concepts of Revelation. Book 4 of the Jewish Sibylline Oracles also shares many cognate concepts with the hardboiled apocalypse in Revelation 9-18 (e.g. Nero redivivus, the Parthian army, the fall of Babylon).