Are they done with the River Raids?

I've been getting back into ACV around last week and finally got around to finishing the River Raids quests, and I'm wondering, are they done with it, like, have they announced a future update or anything? Because on the one hand, the map shows the entirety of the British Isles and Norway while there are only rivers in the South of England, Ireland and France, but on the other hand, idk, when I finished the available quests they made it sound so... final, like that's it, that's the end. So I'm curious, do we actually know anything about that?

Also, while I'm at it, do we know anything about the future of the Hilderan Questline? Like, have they announced a Mastery Trials part 2 (please no 🙏 please no 🙏 please no 🙏) or a Tomb of the Fallen part 2 (most likely there will be, since there are several other Odin runes left in the world, but like, are there any news about that?)