Germany plan to use next summer's Confederations Cup to give their younger players experience of an international tournament.
Germany may not take all of their stars to the 2017 Confederations Cup in Russia, general manager Oliver Bierhoff has told Sport Bild.
"It is incredible for our team and the campaign," Hudson told ESPN FC. "It will be a real litmus test for us and we're looking forward to it."
New Zealand will play at the Confederations Cup in Russia next year after beating Papua New Guinea on penalties in the final of the OFC Nations Cup.
Russian President Vladimir Putin and FIFA president Gianni Infantino have launched the volunteer programme for the 2018 World Cup in Russia.
Tim Howard will return to international duty in September, but Brad Guzan will retain his spot as the United States' No. 1 goalkeeper.