Perhaps this joint convocation is an attempt to stomp on the Devil, but the evil spirits will say "Jesus I know, and Paul I know, but who are you?" (Acts 19:15)
Next, all these denominations will be celebrating the Lord's Supper together.
Some have been "sharing the Eucharist" perhaps under the guise that more ministers will have more power. Do they sense that they are losing power as individuals or is this just a way to boost their own self esteem and continue to lead their denominations astray?
More modernism leads to more ecuмenism. Soon the world's religions will unite under the Antichrist.