Multiples rule for the near future.

It's entering (and indeed is already in) a phase where religion is self-diluting itself into irrelevance. Or at least, into something more in keeping with its actual value.

Christian fundamentalism will likely breathe its last within the coming century; more liberal religions will take most of the next millennium to fade away; but fade they will.

I’m not aware that the world is entering a new era of religious belief. The world will never be united in one religion, multiple religions will remain with us as long as children continue to be indoctrinated. There is a movement away from religion in Western Europe, but this is counterbalanced by higher birth rate amongst those who have a religion, so I can’t see any fundamental shift in the belief systems of the world populations.

Either multiple or none, depending on whether Homo sapiens gets caught up in the current extinction event.

I wish they’d all disappear but I don’t see that changing anytime soon.

It won't change; the human condition means there will always be multiple religions. Nothing suggests this is changing or will change.