I think we can all agree that Venom 2 (with the fight against Andross' true form) is canon. But beyond that and Corneria, what areas did the Star Fox team fight through?
My theory is that the correct route is:
Corneria - Meteo - Fichina - Solar - Macbeth - Area 6 - Venom
The key here is Fichina. It's clear from the dialog on Venom 2 that there had to have been an earlier fight with Star Wolf, and Fichina is the only possible candidate (Bolse leads to the "easy" Venom). Of course, Fox and his team win, which sets them on the path to Solar instead of Sector X. The rest is self-explanatory.
There's also the possibility that they go through all 15 stages, making the whole seven area progression format non-canon.
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"A more mature answer than I expected."~ Jakyl25 "Sephy's point is right."~ Inviso