So far you either find out on the internet or find out when you get there what you'll be facing in an area or dungeon (and it's not practical to prepare for everything all the time). It seems a shame that there isnt any way to find out in game. Asking certain locals about locations on your map, and some knowledgable people responding with "It's overrun by goblins", "I've seen necromancers lurking in tho parts" or something. Who these people are (and who potential trainers are incidentally), maybe that's the kind of gossip innkeepers should be giving via a "locals" topic
Even just some explorers' journals in each town where you can get this kind of info would making planning for the raids more involving. As long as there's some way to deduce where they are, instead of relying on randomly coming across the info as with most books.
TLDR facilitate planning, innkeepers are a natural source for knowledge about notable locals via a topic
Does it make sense?