I'm afraid under no circumstances will Aston give permission to use the cars. I know they spoke about works entry and HWA Aston wouldn't be truly factory team (R Motorsport wasn't either) but HWA would need to get Aston's license and I believe this won't happen.
Let alone the fact cars are unfit to race and HWA doesn't have financing put in place for a season in DTM. Shame. Hope was slim but now there is no hope at all