Incidentally, this describes what I believe to be the great difficulty of PhD research. You have to take a topic you find interesting and read all possible related work in it, which tends to result in significant scope creep as you realize just how much there is that already does you want to do. Having exhausted your initial energy and excitement for the project, you have to force yourself the remaining 20-30% of he…
This is definitely the wrong way of going about a research project, and I have rarely seen anyone approach research projects this way. You should read two or at most three papers and build upon them. You only do a deep review of the research literature later in the project, once you have some results and you have started writing them down.