If they did bring him back which I don't take what he said there as confirmation but if it did happen it would be interesting to know how they deal with the origins connection, will they very lightly reboot sabertooth again or continue the the idea from origins?
They'll have to acknowledge Wolverine's family history with Sabertooth and their century of serving wars together. Those are the only parts of Origins that have not been erased from the timeline (Wolverine even made a reference of the war montage to Xavier) and even the Nagasaki bombing scene in the Wolverine still exists because the sword Yashida gave Wolverine is seen hanging on the wall of Wolverine's apartment in DOFP.