I think she is going to win the whole thing despite the fact that all the other major parties seems to be all against her, so I think she will be able to repeat what happen in the United States, the polls that shows she cannot win the second round are all bought like always.
Her chances are much dimmer than what Trump had in 2016. Remember that Trump was trailing by only 2-3 points in the rust-belt states (most of which he won). However, as per the latest opinion polls, Le Pen is trailing Macron by almost 20 points.