I think Messi will play in Barcelona against his will . what do you think ?
Yeah he will not be satisfied if the team does not improve but he will not be in Gareth Bale mode since he has no intention to ruin his reputation and to keep his odds very high to join another club with good contract in the next year eventually.
As a footballer one will not be satisfied with his/her team mate playing awfully -lets permit Messi to express his feelings- but messi annoyance is with the way Barcelona in ran -the board,management- I think he loves Barcelona as a club and he would still play all his best for the club. In between what a drama this Messi leaving was.
I think Messi will not go anywhere. Next year there will most likely be elections for a new president. The new president of Barcelona will do everything to keep Messi. Plus Messi will age one year and hardly anyone will need it as a player, although his name will still work for marketing.