The Belgian is on loan at German club Borussia Dortmund but has had a miserable spell in the Bundesliga. The highly talented winger has failed to impress Thomas Tuchel and has been starved of regular first team football.
— Paul Santacast (@UtdRantcast) December 28, 2015
However, it could also be that Januzaj is enjoying his winter break from the Bundesliga.
It is perfectly normal for players from other leagues to travel abroad and attend high profile games like Manchester United vs Chelsea during the Christmas period when most European leagues enjoy a break.
Although Januzaj returning to Old Trafford is not impossible, it is highly unlikely considering the fact that he never quite managed to impress Van Gaal.