I have a modern book; Les Valois by Patrck Van Kerrebrouck, that seems well-researched and does include illegitimate children and their descendants of the dynasty, but doesn't mention any illegitimate children of Charles de France, Comte de Valois. If Antoine had been recognised as the child of Charles of Valois, then you would expect there would be a record of some sort.
Even Antoine being named after his mother seems to reflect a later tradition when illegitimate children were given their mother's name. Illegitimate children of royalty during the medieval era were often given a name that reflected the status of their father, eg. Fitzroy, or Batard d'Orleans.
There seem to be a few of these, probably spurious, royal lineages in Wikitree, either because a historian had wanted to flatter a later descendant by inventing a royal connection, or an emigrant wanted to improve their standing in the community, by also inventing a link to a royal ancestor.
I think the usual Wikitree practice is to disconnect the person from one or both parents, but put something in the biography.
(Even Antoine's wife Judith de Ponthieu seems a bit doubtful if we are to assume that de Ponthieu meant she was from the dynasty of the Counts of Ponthieu, rather than just from the area of Ponthieu, as the Countess of that period was Eleanor of Castile - see list of rulers of Ponthieu http://fr.wikipedia.org/wiki/Liste_des_comtes_de_Ponthieu