The G20 or the G2? How times have changed since 2008 when developed and emerging nations first came together to find common ground in response to the worst financial crisis in decades. This year's G20 in Osaka, Japan could well be overshadowed by the Saturday sidelines sit-down between the two superpowers that are the United States and China. As for the rest, all they can do is hold their breath to see if a trade truce can hold, lead to a deal or descend into open hostility.