Dos Santos, 23, recently revealed how he rejected offers to leave the Nou Camp this summer, however, was convinced to stay.
With a plethora of attacking talent in the Barca squad, dos Santos is finding it difficult to break into the team, and he says this may force him to leave.
"My dream is to play in the World Cup next year, but if I don't have the minutes with Barca I will have to entertain the idea of going into the transfer market this winter." he is quoted as saying on ESPN.
And dos Santos said because of his lack of game-time at the Spanish Champions, getting called up to the Mexico squad is difficult:
""It's not easy. I have been almost a year without playing many minutes, and because of this it is difficult that I get called to the [national] team. [Barca] knows my intentions. If I have the minutes I would stay, if not…"
However, despite signalling his intentions to leave if he doesn't get game time, the Mexican has declared himself happy under new manager Gerardo Martino.
"Tata has put his faith in me and I have faith in him," he said.
"My chance is going to come, and when it does I hope to be at 100 percent.
"I am still young and I know I have to be ready. The manager has shown faith in the youth, but has told me clearly that I should be aware of the team I'm on and the players who are ahead of me."