Did you mean to invoke the authorship debate, or just point out the generally-settled fact that the Bard played script doctor and collaborator on some of the lesser works attributed to him?
Authorship. Whether the Bard was a pen-name for some famous person using WS as a front.
Personally, I don't buy it, but there are a lot of people who do. Notable among them is Sobran, who has written a book claiming that the Earl of Oxford wrote Shakespeare's play and poems.