Katekyo Hitman Reborn Future Arc Sims By Noyoutoday

These sims can be found at Thai the Sims 3. Registration Required.

Future Hibari
Future Yamamoto
Future Gokudara

Hibari Kyoya Sim by Kikomachi

This Sim can be found at TSR. Registration Required.

Hibari Kyoya By Rurikamiya

This Sim can be found at the Sims 3 Exchange.