According to the park, Dodonpa's launch speed will be increased to 180km/h (111 mph) in 1.8 seconds thereby increasing the intensity from 2.71g to 2.83g. Also, the loop will not be the tallest, but it will be the largest in diameter.
Loop Diameter: 39.7 m (World's largest * Guinness records acquisition loop of America exceeding 38.75 m diameter in-house investigation)
Loop Height: Approximately 49 m (160 ft) above the ground
Maximum Speed: 180 km/h ( scheduled ) at 1.8 seconds start * Old Dodonpa maximum speed: 172 km/h
Full Length: 1,244 m (old Dodonpa 1,189 m)
Source