Well a giant very complicated can of worms, if you place the Spanish/Parmese?Sicilian Bourbons after the Orleans, then technically they should be excluded entirely. That said it would be very easy for someone to reinstate them as Philip V's renouncing of the French throne was technically illegal, if they are reinstated then Ferdinand VII should be king.
Now if they stay excluded the next would be the House of Condé with Louis VI Henri Joseph de Bourbon as king then if things go according to OTL he dies in 1830 leaving the throne to Louis François II de Bourbon-Conti, he died in 1814 with no heirs. After that you would have to trace the family tree all the way back to at least St. Louis IX, so it more than likely the Spanish/Parmese/Sicilian Bourbons would just be reinstated.