STP,
I have gone through the Greek text here and I simply have no idea what you are addressing. Communication will improve enormously if you don't take a thing like "Mark 1:2" and say it is a lie, when it contains 10 or 100 items.
Now it sounds like you are saying the whole book is a lie. The whole gospel account Mark? The whole NIV? A Greek grammar book? You are so far from clear.
I really enjoyed your feast line of thought--that those things are fulfilled in Christ. It was real theology, even though I think fulfillment is still broader, that it is all that Christ did, not one for one (feast and act). But this here is just junk thinking.
Mark 1:2 is not accurate in the niv, its quoting Malachi 3:1, not Isaiah.