It looks as though Barcelona's number one signing for next season will indeed happen.
According to a report from Mundo Deportivo, Paris Saint-Germain defender Marquinhos will hand out a formal transfer request to his team after the last match of the season, the French Cup final against Marseille. The Brazilian is specifically interested in moving to Barcelona, and will make it clear to his bosses, who are expected to accept the player's request and start negotiations.
Marquinhos is Barça's biggest priority for the summer transfer window. Coach Luis Enrique asked sporting director Robert Fernández to sign a young defender with speed, versatility and passing skills to fit his system and play alongside Gerard Piqué and Javier Mascherano in the next few seasons.