According to Josep Maria Bartomeu who is the president of barcelona,he said that barcelona will actually not sign neymar in january,this was confirmed by the president of the barcelona team when he was questioned on whether the club will still sign neymar from PSG on january...
As for me i think that neymar should just stay at PSG and just keep improving his performance at the club,i feel a great performance by him at the club will be good for his career and going back to barcelona does not guarantee any success because no one can actually predict the future....