The Newcastle United forward needs to pull a cat out of the bag.
The 23-year-old's first-team hopes at St James' Park looked bleak but the fact he has only left on a temporary basis suggests he could still have a future on Tyneside if he proves himself in League One.
So will he be inspired by fellow Newcastle youngster Adam Armstrong?
Armstrong, 18, joined Coventry City on loan at the start of the season and has already scored five goals for the Football League outfit. But, if Vuckic can't do the same for Wigan, serious questions will be asked at Newcastle.
Armstrong clearly has talent but for a striker five years his senior not to produce at a similar level would surely create doubt over his ability.
After their strong start, Coventry sit fifth in League One. But Wigan are only three points behind after five games.
Vuckic's loan spell at Rangers suggests he can produce at a lower-league level, though, and he may end up competing with Armstrong in terms of league goals. That means the 18-year-old will likely provide a barometer to measure him against in terms of the Slovenian's hopes of a Newcastle future.