Lack of understanding and cooperation among Christian’s denominations in some quarters especially in Nigeria and some other countries across the globe is becoming worrisome and concern for some church leaders and church historians. Although, fighting, schism and division is not entirely strange to the church, however, when such misunderstanding persists, then, there is fear of what the future would look like. Consequently, this paper focuses on the future and prospect of ecumenism or church unity in Nigeria, and the world at large. If the future of the churches would be prosperous, there are things that should be emphasised, because they are common and unifying factors to all Christians. Such things include: God, Jesus Christ, Holy Spirit, faith, baptism, bible, hope, love, prayer and resurrection among others. In the same vein, there are things that must be de-emphasised, because they are capable of polarizing the church in all ramifications. Such things include denominational excessive claims on doctrinal issues, regalia, nomenclature and structural issues among others. If what should be emphasised are emphasised and what should be deemphasised are also strongly deemphasised, then the future and prospect of church unity would be very bright, but if otherwise, then it could be suicidal.