The more I consider a Dalinar-Navani dual-ascension to Honor, the more likely it seems:
It's a mode of ascension we haven't seen yet, and obvious enough to be early in a brainstorm on "what are different ways someone could ascend"
It fits neatly with Honor's intent - marriage is a contract of fidelity
It's adjacent to Brandon's actual theology - specifically, the tenet of marriage as a requirement for deification
It would allow Brandon space, as an author, to explore his own marriage - what does it feel like to be in charge of something important with someone you love, but who also gets on your nerves sometimes? What does "fidelity" mean? Is there a point at which slavish adherence to a marital contract is no longer morally right?
It would create a shard better positioned for long-term balance, which could either serve as an example to other shards of "what good looks like", or as yet another cautionary tale of how shardic power and intent can spoil even the best
This also leads me to a broader hypothesis: the long-term solution for the shards will be a democratic one; Adonalsium's power will be distributed and shared by every being in the universe (see the Iriali idea of "The One").
P.S. Long-time lurker, first post. Not quite ready for the full community commitment, but wanted to get this idea out there.