He will stay and be given another chance by the board.
I think it was Sid Lowe who said this near the start of last season when he attended a game; he said that he noticed the Camp Nou crowd would come roaring alive when Dembele was dribbling with the ball at full speed. The fans sensed that there was a chance they could see something exceptional in a blink of an eye.
He said that the Barca fans were subdued for the most part, but stirred when Dembele was running in space, and this surely would have been noticed by the board sitting at the stadium.
The board knows a lot of fans want him to succeed because of what his skillset could offer to the team, and thus he will be given several chances.