Obertan joined United from Bordeaux for a fee of £3m but his arrival went largely under the radar as United coped with the fall-out from Cristiano Ronaldo's departure by announcing the arrivals of Antonio Valencia and Michael Owen.
However, Ferguson is optimistic that the French youth international will be in a position to make a real impact at Old Trafford once he shakes off a troublesome back injury which has so far kept him sidelined and firmly out of the spotlight.
"Gabriel has had a spine problem but I think he will be back in a month to six weeks' time,'' Ferguson told Inside United. "We are taking our time with him because we want him back and 100%.
"He is very quick, can play wide both sides and through the middle so he brings a real versatility to us. We expect big things from him.
"At 16 he was one of the outstanding talents in Europe. But he has been playing with this back injury for a year and a half and no-one thought about getting a scan."
The attacking midfielder, who graduated from the famed Clairefontaine academy in France, was on Wednesday named in United's squad for the group stages of the Champions League.