I think that Tyrantrum may be a cadidate to make OU, but more likely not imo. It's stats are OK, with 82 / 121 / 119 / 69 / 59 / 71, where attack and defense are great but Sp.A, Sp.Def and Speed all leave you hanging. Although you wont likely be using Sp.A, the one that may hurt out T-Rex friend the most is Speed. 71. That doesn't look like OU material to me. BUT, that attack stat is great, and with two great abilities, In Strong Jaw (mainly for crunch) and rock head (STAB HEAD SMASH THOUGH), it can be threat offensively. Maybe the best way to go with it would be a bulky band, with max hp and atk, or scarf with max speed and atk. It also has access to Stealth Rock, which is great considering not a whole lot of gen 6 pokemon do, maybe none other that Tyrantrum. You run a tank like set, with maybe SR/Dragon Tail/Head smash/ Earthqake with rock head. It also has Rock/Dragon typing, which while unique, is not the greatest defensively or offensively, with the introduction of Faires (Tyrantrum gets screwed by Mega Mawile ;-;) and the fact that its STABs are walled by Steel types.
Overall, i think Tyrantrum will end up UU, or around there. Depending on the position of other pokemon, it could likely fall to RU or rise up to OU (OU is extremely unlikely imo). It has great attack power, physical defense, and good abilities but it's speed and typing are just not good enough for OU, among other reasons which i explained. *Feel free to post your response and your opinion on the tiering of Tyrantrum* :3