The last days

What if most of the prophecies in the bible have already been fulfilled?  What if all of them have already been fulfilled?  What if 'the last days' the NT authors wrote about were really as close as they thought them to be?  What if all the things predicted by Jesus in the 'Mount Olivet Discourse' (Mat.24) were really, as he himself said, to be witnessed by the generation of his day?  What if the book of Revelation really contains pictures of things which, back then, were shortly to come to pass (Rev.1)? 
What if 'the last days' (and the end of the world/age) refer to the last days of the old covenant between God and Israel?  What if the king has already delivered up the kingdom to God, and now there is a new covenant: God being father of all, God being all in all? (1Cor.15)