Henin played really badly early in 2008, she was obviously burnt out which is why she retired for a couple years. Even today not at her very best again yet perhaps, she is easily better than 2008 which was probably her worst tennis ever.
I still see her winning the French as even her 70% is better than any of the current WTA's 100% on clay. Like Nadal if she is even coming close to winning on other surfaces winning on clay should be easy for her, even more than her as the other potential championship women mostly suck on clay. Like I said other than maybe Clijsters and Jankovic there isnt anyone else to win the French. It certainly wont be Dementieva, Azarenka, Safina (healthy or not), or Serena.