On this point, we have NOTHING NEW!
Yes we do have something new. We have a document that Obama swears is real, is official, that states that his father is Barrak Obama. Now we can officially state that he is ineligible. If there really had been something unseemly such as an American citizen father (Frank Marshall), a man who was not Obama Sr., actually shown on the BC, there would only be a challenge to the authenticity of the document.
As it is now, the document may or may not be real, but the official declaration of Obama Sr. as the father makes Obama Jr. ineligible.