He is intent on leaving no matter what. He has eyes only for us as his next club. He will be a City player, for what its worth i never post absolutes unless im sure as sure can be.
That is simplistic in wording but taking everything into account i see no other outcome.
The only possible road block would be Barca somehow delaying the move past end of transfer window. Even then, every footy fan on earth would rage at Barca should he somehow miss games or a chunk of the season due to legal nonsense. More than a club? Bartomeu would be the guy who not only drove Messi away but who also made Barca look like the bitter nasty man of football. He would be crucified and the next president would likely take legal action against him.
Something along the lines of Bartomeu reducing the clubs commercial appeal through wreckless business practise etc etc.