Armageddon - which is the n-teenth event of Revelation - cannot possibly be imminent, because the 1st earthly event of the vision of Revelation has not yet taken place.
First and foremost must come a shout of apprecation from everyone alive to both God and to His Christ (Revelation 5:13)
This has never happened, because such a unanimous world-wide shout of praise would have been recorded somewhere in many nations' histories.