Fun? Hope you guys have a $500,000 or so stashed aside for this fun party. That's likely what you need to prevail even when the facts are on your side.
My statement is that React builds on > 10 years of ideas from open web frp frameworks and > 20 years of reactive frameworks in general. Companies wanting to bust patents here would certainly get support from early creators like us. Certain ones like Google have been know to do that sort of thing, and I wouldn't hesitate to help them if they identified anything.