"suspected, as did Dean, that Doerr was setting them up for an ambush on his home turf" Why the ambush? Was John Doerr previously trying to deliver the same me

"suspected, as did Dean, that Doerr was setting them up for an ambush on his home turf" Why the ambush? Was John Doerr previously trying to deliver the same message (that the product wasn't ready), but needed Jeff Bezos and Steve Jobs' firepower to finally convince Dean Kamen? The article only hints at it, but this sounds like there's a bit more drama in the Doerr/Kamen relationship.