Ice and technobarbarians sound like a lot of fun. There is another advantage to technobarbarians, in that the techno part implies they may have scraps of advanced technology from more ancient times. So as well as getting to have bloody fights with them, as adeptus mechanicus we would be very interested in any tech shinies they might possess.
I also find the concept of an ice world to be rather interesting and innovative, as I do not recall any other 40K game having taken place on an ice world. I know there was a Primarch game which had as his origins he lived on an ice world, but I didn't read it that much.
There are other advantages to an ice world as well, such as if we're starting out on one, the odds are pretty good that we might possess for instance better insulator technology for cables and circuits, or possibly for armor plating but I'm thinking more in terms of energy transmission because intense cold would mess with that. That would be useful because then we could make technology like, say, plasma weapons with better energy transmission, so maybe we can make certain technologies like plasma weapons or other high temperature weapons with less issues of catastrophic meltdown or weapons malfunction.
Since the common element of all the origin stories seems to be that the forge World were showing up on is both minor and either in decline or in stasis because they can't run all their equipment, there is hope that, being on an ice world, the local environmental conditions inspired the local Admech to take advantage of the intense cold, and a number of items are hopefully preserved in better condition than they might have on literally any other world. At the same time though, I am worried that perhaps the technobarbarians may be rating mechanicus supplies or caches of material that we've put into storage, specifically to get a hold of our more reliable equipment than whatever shoddy stuff they have.
I understand that the majority of this game, like many of the other 40K games, will focus on the protagonist mechanicus faction and our character, as the main characters, but I do hope the technobarbarians get some good characterization, as well as semi recurring villains or local environmental flavor. But that's the thing, in other games they tend to be viewed as environmental flavor, I would like them to have a little more of a dynamic fleshed out interaction to them. They have lived on this world for thousands of years; they sound like they would be like almost like aggressive Inuit, people who have lived in under such intense icy cold conditions that their entire culture has warped around it. For instance the Inuit have like 37 separate words for snow or something like that, I forget the exact number it was just a piece of trivia I remember reading at one point. So interesting stuff could be worked in like that. I do hope they are not just the equivalent of Warhammer Fantasy Norscans, which themselves are an uninspired compilation of derivative stereotypes of the worst elements of Vikings and other anglo-germanic Invaders from the Dark ages. I'm hoping that there's more to them than that.
The implications of an ice world are rather fascinating too. It would imply, just from the description alone, a world a lot like hoth from Star wars, so I wonder if this world is stuck in a global ice ball ice age similar to what happened to Earth 600 million years ago, in which case it might be possible to undo the icy conditions, or are we so far from the Sun that we are simply perpetually Frozen more like europa. Either way there are implications for instance Europa has due to local planetary and moon placement gravity tides have created liquid water due to the heat from tidal forces so if something similar is happening on this world then we could potentially have a lot of fun fighting giant underground gribly monsters, or we could find huge underwater ruins, or maybe this planet was a lot warmer and something happened during the men of iron revolt, who knows you could do almost anything with that kind of a story idea using geography as a narrative element. If we are stuck on something like a snowball Earth I have to admit, maybe finding terraforming technology might be really fun, and then we could start throwing out the planet and restoring it to the state at once was and then we could find maybe horrific things that man was not meant to know on it buried in the ice or something. My mind is kind of running away from me with all kinds of interesting ideas, but I hope some of what I'm saying does serve to inspire others as well.
Oh, and in case it's not obvious, I'm dictating this into my phone which has speech to text capability. I imagine that having to type all this out manually on my phone I would literally have my fingers break off on my hand, this is so nice! I love modern technology!
EDIT:
@Heimdall1342 , I had a lot of fun bouncing around ideas on the 40K thread story "The road to Glory". It was during a time in my life where I got rather carried away with my nerd enthusiasm, and I had a lot of time on my hands, so I ended up becoming kind of accidentally co GM of that game. I can't do that here, my life has changed a lot (for instance I have a 10-month-old daughter who is the best thing in the world, she's on her way to becoming a tech priest😎 ), so I can't get that involved because I simply don't have the time, but I do have a lot of game resources, ideas, tech stuff, etc. So if you want someone to bounce ideas off of or you ever want to chat, I would love to provide some feedback for you with your game. This game looks very exciting, it looks like it can go very far and do an awful lot of fun crazy awesome AdMech stuff, and I would love to support you indirectly if I can. Other than that I will be an enthusiastic supporter of this game is just a normal player. Can't wait for the game to officially begin!