Some magazines articles came up these past months, here are a few scans with some new screens.
Another new screen from
OXM as Corporal Hicks pointed out. (Click for HQ) and
the rest of it.
Micromania: (2 new screens on page 2 and 4, old info)
On slightly better quality from another scans:
PC Action (Old article that wasn't posted, It has some concepts on better quality)
Also, Darkness reported
3D World magazine is featuring a making-of the game this month with lots of concept arts, no scans available yet.
These were posted on
SEGA forums, they look like scans to me so they may be from the magazine.
Enjoy.