Le Pen wont win the general election but there is a good chance she qualifies for round 2 against either Fillon (right) or Macron (Center/left altho he is viewed by many as lot more center than left).
So you are likely to have Le Pen vs Fillon and in this case Fillon will win or Le Pen vs Macron and high chance Macron wins as all the center and left will rally behind him (and even the moderate right).
But yeah this will be 2002 all over again.