Read the headline again, slowly
Well, I read the headline again - slowly - and my point still stands. It'll be news if he actually does have verifiable, corroborating evidence. That he's announcing that he will have evidence in the future is not news.
There's so much dirt on Obama that the natural technique we can expect them to use is to set up some false stories that they can knock down, and then try to lump every legitimate criticism of Obama with those discredited stories.