The following tweet from Lucasfilm Magazine (also known as the French Star Wars Fan Club) appeared last week:
The text, translated to English:
Last year, an Indiana Jones video game was proposed... and here are some of the many concepts that were explored by American artist Steve Chorney in collaboration with a Hollywood advertising agency. But alas the project did not see the light of day.
So, was this something that was being considered independently of the MachineGames/Bethesda project? Who knows, but anyway now you have some cool sketches to look at.
Source: Lucasfilm Magazine