On April 23rd, the Africa West Area Presidency announced a significant realignment of the seven missions in Nigeria. No missions will be closed or opened as part of the changes. However, the Nigeria Calabar Mission will be renamed the Nigeria Uyo Mission, which was the original name of the mission from 2002-2008, and mission headquarters will be relocated to Uyo. Here are additional changes that have been announced:
Source: Growth of The Church of Jesus Christ of Latter-day Saints (LDS Church)