Absolutely nothing will happen to Obama that much is guaranteed.
Obama will live out his days writing books, making millions, flying private jets, enjoying oceanfront mansions in Martha's Vineyard. He will never be criminally prosecuted or have his legacy removed. Everything else is just hope porn with no basis. As of now, we are still at zero criminal prosecutions of any traitors. So only an idiot would bet that Obama will go down.
Trump's DOJ will arrest and prosecute all vigilantes. But the thousands of violent insurgents will remain completely free, just like all of the traitors. Nobody of any importance will ever be criminally prosecuted. Take that to the bank.