Alright.......
- Trains: It's said we're going to get all fuel-types. Not every single train, but every fuel type with a good variety in them. From my conversations with him long ago we were to loosely expect mining trains, steam, coal, diesel, and even electric. As for the trains different track types is yet to be known, or if it'll be a universal rail system. I would expect various cargo wagons behind, even hoping liquid & solid storage types would lock to their item type.
- Dungeons: They shall be ruins above & below the ground with various threats within. You'll have to fight your way through, or sneak your way through, that the more valuable the treasures the more difficult the threat. I want to compare it to Skyrim, yet we'll have to see what Red51 does. We will however gain our Indian Jones type stuff from it. They will contain the monsters which people bias-related fear with unjustified fear.
- Horses: Can't say for sure, yet we will get horses & camels. We'll be able to customize them through banners/flags (maybe), possibly with various armour types and equips. Even hoping Red51 has learned a few lessons from 'Mount & Blade: Warband' for how 'weighted' how horses feel & move in that game. Horses feels the best in that game. We should hopefully have a more 'realistic' way of putting saddles on them, feeding them, taming them, & such. Even how you can tell the horse to run at a certain pace, keeping that pace. The horses would eventually need additional expansions to drag wagons behind them for storage & such. I'd however be fine with just starting off with one horse to tame to then put a saddle on him, equipping the horse for speed & item transport.
- Boats: I have a feeling I had to force Red51 onto this as to not waste the potential to waste the waters. Minecraft is a piece of shit here that Rising World should obviously rise above Minecraft's failure. The way I told him to simplify boats is to make use of Egyptian Payrus for the desert type & the obvious canoe from logs (trees), among other 'daily life' uses for books & scrolls from Papyrus. We should be able to make boats out of wood (canoes) & from Papyrus to make those ancient Egyptian Nile related boats. That, and if we do get boats that they'll stay small to stay within rivers, lakes & shallow ocean sides. The deeper you go into the ocean the more damage they'll take from the environment, even sinking enroute. From Red51's words, You would have to repair the durability & damages over time (at least in his thoughts) that the boats would be personalized to you. To me, that would justify building boatyards & shipyards for the long-term, not having boats for only one trip, or even a quarter of it.
Important: Boats need to be customized + have a storage chest container somewhere within to haul goods across the map. Learn from Minecraft's failures.
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Oh, how I'd love to have NPCs, indeed. What Yakme is saying seems more like a mod thing now & I'd be happy to see such. Loading your transports would be a neat thing to see, if we ever do gain NPC comrades to call your own to settle with you, maybe even customizing them or themselves on their own. I want to keep pushing Red51 on NPCs, yet he has other updates to tend to. I'll push him when we get NPC Traders in both admin & roaming survival. Red51 can hate me once we get to the NPC Trader update.