I assume it would be possible to import the App splash screen images and place them as a background to the main screen? It would require moving some of the text and buttons but I think it would be worth it for the good initial impression.
Something like this maybe?
MoM2

Descent

I could find the images as .dds files for MoM in:
C:\Users\username\AppData\Roaming\Valkyrie\MoMimport\img\
But couldn't find the Descent splash, in its similar directory. But I assume it has to be in the content files somewhere.
Some options if we don't want to use the official artwork:
(Using Royalty Free Art)
MoM2:

Descent:

I really like the Royalty free for Descent.
For MoM, I like the design and color, also the evil crow :)
Just to mansion looks more like a castle IMO.
I agree, I liked the whole thing except the castle aspect. But looks pretty cool and it's hard to get clearly defined royalty free stuff without paying for stock.
For MOM splashscreen there are some nice ones on https://wallpapercave.com/haunted-house-background. Examples (high-ress downloads available on the site):



And more...
The site suggests that all images are free of copyrights: They use the strategy that anyone can upload as long as it complies to policy and rules.... and it will stay on the site as long a s nobody complaints.
The second mansion is the best IMO.
Nice find @antontimmermans :)
If the images from https://wallpapercave.com are ok I would prefer this one for descent:

https://wallpapercave.com/w/uwp10758
But there is a lot of other "rock dragon" images there:
https://wallpapercave.com/rock-dragon-wallpapers
That's very nice
I'm really not sure about the licensing situation here.
It seems nearly impossible to find the original source of the images even when using search engines like this one:
https://tineye.com/search/3112d12ff7139e601fe5bfe24d02a057ec61f6ef?sort=crawl_date&order=asc&page=1
Maybe the images from post to are better because licensing is more clear for them.
I don't want to merge anything that doesn't have clear permission. Legally no licensing information means it cannot be used.
That's the original on the page of the author (checked the magic card there to see the name)
https://www.deviantart.com/sandara/art/Temeraire-66213180
Doesn't seem to be free of right though so we can't use it.
Most helpful comment
For MOM splashscreen there are some nice ones on https://wallpapercave.com/haunted-house-background. Examples (high-ress downloads available on the site):



And more...
The site suggests that all images are free of copyrights: They use the strategy that anyone can upload as long as it complies to policy and rules.... and it will stay on the site as long a s nobody complaints.