Determination to fix economic trends on growth, trade and investment – and sliding confidence about the benefits of globalization – permeates a draft of a communiqué expected to be adopted Monday by G20 leaders. But according to a copy seen by The Wall Street Journal, the G20 list of remedies rivals the world economy in its complexity, running on for 7,000 words with ideas about migration, terrorism, energy and the spread of the Zika virus. The final document, said a European diplomat involved in the negotiations, risks looking “like a Christmas tree.” The G20 had its biggest impact eight years ago when a summit was hastily arranged to address financial market mayhem. Now, the gathering risks losing focus with each country promoting its own views and pet projects.