I don't typically delve into prospective (or in this case, cyclical) speculation, but I lean towards a hypothesis for eternal progression nested within Multiverse theory. Specifically, Max Tegmark's Level IV: Ultimate Ensemble hypothesis. Intelligences are fundamental informational/mathematical structures with no end nor beginning. However, these structures do not have the ability, on their own, to observe their eternal existence. They must observe reality to comprehend their own existence and the existence of others, i.e., experience mortality.
Within this ensembles of possibilities, one must not only exist at the meta-level as a theoretical bundle of information, but exist within a reality to begin to comprehend oneself. Thankfully, loving, caring beings exist at the meta-level who not only have the ability to know themselves and know others, but desire the same for others. They heat or reheat a reality, or eternity, (see the Greene or Steinhard-Turok models of creation), giving form to intelligences. Put another way, they become their parents, giving them the ability to observe their existence.
Yes, the above sounds like crazy talk, but it's simply my attempt at a fun thought experiment that seeks to reconcile seemingly contradictory truth's like the eternal nature of God with a God who experiences mortality, along with Joseph Smith's ideas around a plurality of eternities (this idea began to emerge towards the end of his life and never got fleshed out), or the course of the Lord being one eternal round.
Anyway: