Might still be prosecuted for breach of English Law if he comes out of the embassy.
This might depend on the winner of the Ecuador Presidential election.
see url: http://www.reuters.com/article/us-ecuador-election-idUSKBN1740F8
Nobody is saying if there is an application for extradition to the US for violations of publishing classified information.
He could be stuck in the embassy for ever, there again, he could be kicked out of the embassy and arrested. As he jumped bail the last time, he could be remanded in custody and an application made by the United States for him to stand trial there. His friend, the US President, might of course, stick up for him, but it is highly unlikely at this stage of the proceedings, as he is in deep shit himself and it would only exacerbate his position...