Latos has strong stuff. At 6 feet 6 inches (1.98 m), Latos throws from a high release point. He throws a four-seam fastball (91 to 96 miles per hour (146 to 154 km/h)), a two-seam fastball (90 to 94 miles per hour (145 to 151 km/h)), a slider (84 to 87 miles per hour (135 to 140 km/h)), a curveball (78 to 82 miles per hour (126 to 132 km/h)), and a changeup (82 to 85 miles per hour (132 to 137 km/h)). (wikpidia)
He has a higher top end than Hammel. Potentially if he can get it all together he could be equal to Arrieta. He has that type of arsenal at his disposal. It would not be a dumb gamble.