There are many problems with this theory. First that the church fathers are unanimous in saying that Matthew wrote first. Second that Mark has some details that the other Gospels don't have, so the idea that they just expanded on what he had said makes less sense if they were taking important things out too. Third that the length and content of the Gospels has more relation to who their intended audiences were than the order they were written in. And fourth, which is the point of this article, that there was no legendary embellishment of who Jesus is from Mark to the later authors.
So here we will go through Mark's Gospel and draw out how it tells us about Jesus' deity loud and clear. To me, Mark's Gospel seems the best place of the four to start, as it is the shortest, and the other Gospels do cover some of the same ground, so when I come to cover those books I can leave out the passages with events already looked over here. You may like to have a Bible handy while going through this for reference, though the most relevant details will be included. I have skipped some sections, so there's every likelihood I haven't noticed something that is a subtle clue to Jesus' deity, but there is more than enough here to cover it without doubt.
