A Story Mode is the biggest reveal, but Waluigi’s voluptuous hair is a close second.
After Mario Tennis: Ultra Smash, it’s reasonable to doubt Camelot’s sports game prowess. The once-legendary developer has had far more misses than hits. While Mario Golf: World Tour on 3DS was largely excellent, Ultra Smash and Mario Tennis Open were varying degrees of disappointing. Even their contribution to Mario Sports Superstars wasn’t great.
Source: Nintendo World Report Updates