This topic seems to continually be over analyzed when it really doesn't need to be over complicated.

The themes and mythology of the WoT world are pretty well established by RJ in the books. Time is a cyclical thing and the seven ages "repeat" themselves. Things that happen in one age trickle down through the next few as legend and myth. "Repeat" doesn't mean that every same age is identical. It means that similar themes and things happen in each age acted out by recycled souls in new bodies and personalities.

So knowing what we know about the world in which the story is written it isn't hard to take the very obvious clues and apply them. Merc and Mosk, Anla the Wise Counseler, Elsbet the Queen of All, Lenn and the Eagle, the Mercedes Benz hood ornament, etc. The story takes place on our Earth and our current age serves as a source for myths and legends in the third age. When the first age comes again it won't be our age. It will likely just have a few of the same things with totally different events and resulting stories.

No need to add complexities like alternate realities. It's far more simple than that. Occam's razor.