Considering the pocket infinity is a year 1 item and not everyone has it especially the year 2 players, i dont believe it will have anything to do with it. Destiny is being pushed to nurture the year 2 players so there is no way they would make such a main attraction of TTK obtainable only with the pocket infinity. The only way this would be plausable is if they made it easy obtainable for all players as a mission by means of buying it during said mission or as a reward. But again seen as though there is no year 2 version i highly doubt this.