For the love of God, no more Belizarius, :o There’s a ton of those, across the HD workshop and the DE mods.
I doubt the FE would do Ragnar, because they’d have to try to top Philthydelphia’s “Ragnar’s Saga” and that’s a VERY tall order. Ilam made a very good Harald Hardrada campaign- though the translation could use some work,the gameplay’s rally fun.
There’s a Part 1 of a Pacal campaign in Mods, but I haven’t played it yet.
I would hope for an expansion focused on the Indian subcontinent- 2 new civs + a Persians campaign. If we are getting 3 new civs, I’m guessing the 3rd one will be India-adjacent- either the Thai, or Tibetans.
Indians have been getting some custom scenario designer love, but it’s mostly for the Dharma conversion/expansion mod;
And Persians are overall a civ with the least custom content of note across vanilla AoC, HD and DE… only the recent Apranik campaign is really worth mentioning.