PC/WI/AHC: House of Capet terminates earlier

The House of Capet, after an unbroken chain of sons inheriting the throne, suddenly ran into problems in the later 1200s, leading to the extinction of its male line in the early 13th century.
What would the ramifications be of a similar crisis taking place earlier?
 
Prevent Louis VII from having a son but in that case, the Plantagenets will probably inherit since it was said that the daughters of Eleanor with Louis VII were disinherited.
 
The House of Capet, after an unbroken chain of sons inheriting the throne, suddenly ran into problems in the later 1200s, leading to the extinction of its male line in the early 13th century.
What would the ramifications be of a similar crisis taking place earlier?
The male line never went extinct though? The MAIN male line did, but there were still cadet branches out there.
 
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