A few resources for World Communion Sunday:
Global Ministries Resources lists a number of reflections, worship resources, litanies, prayers, etc, from different countries & traditions:
"The first Sunday of October has become a time when Christians in every culture break bread and pour the cup to remember and affirm Christ as the Head of the Church. On that day, they remember that they are part of the whole body of believers. Christians celebrate the communion liturgy in as many ways as there are congregations. World Communion Sunday can be both a profound worship experience and a time for learning more about our wider community of faith. The following are bite-sized morsels to stimulate creative thinking. Each one offers a starting point from which to create a meaningful worship experience for World Communion Sunday. New resources will be added periodically."There's a fascinating article on Sukkot and World Communion Sunday at PC(USA)'s Ideas for Church Leaders:
"Sukkot is a reminder that we are all ingathered under the same stars, that the rain falls on the just and unjust alike, and that we must all be held together in thanksgiving. The celebration of the Lord’s Supper every Sunday, and in a particular way, on World Communion Sunday, is a foretaste of the day when it will truly be so."At his Sermons & Sermon-Lectionary Resources site, Richard J. Fairchild has lists of practical ideas for World Wide Communion Sunday Celebrations.