Why would the Traveller be reviving Goku if he's trying to kill everything? The answer is it wouldn't. Goku would be plucked from the DBZ universe and put into the Destiny universe. If he could revive (which he can't) then this isn't even a question obviously Goku would win eventually. Since there is no way for him to come back to life Goku would need to kill everything flawlessly which is highly unlikely...