I don't think that's possible. If I'm not mistaken, the thumbnails for linked items always show the game's representative image, not a particular version's representative image. If you want to see the images for a version, you have to go to the game page and then click the entry for the version.
It might seem like a flaw - but how would you handle it if the same publisher has published more than one version of the game? Which image would be shown then?
Well in the case of eeBoo they have published multiple versions of different games. I think that each "version" is what should be linked and not just the generic game entry. What's the point of linking a generic game and having info on the publisher page that doesn't have anything to do with the version they published? In the example I am talking about with the publisher eeBoo the stats that are listed by the linked games have nothing to do with they game the publisher actually published including the year published. This is misleading and beyond not useful.
Certainly when looking up the games a publisher is supposed to have published you would expect to see the games they actually published and the year those games were actually published. What is the point otherwise? It's a stretch to have to go back to the linked game and then search through the versions list to find an actual match.