Well the current D2C chassis underpining the S-197 Mustang came out in 2005 so assuming a 9 year model run we won't see a new chassis until 2014. Ford also said in their 2006 "Way Forward" restructuring plan they weren't currently working on a new RWD chassis so the D2C could be underneath the Mustang for a while, like the FOX platform. The FOX platform worked fine and they even revamped it into the FOX-4 so we could see some D2C revamps. If the new chassis does work in IRS (like the Australian Falcon has, which apparently fits under the 'Stang) we may not see it until later even. Ford has does wonders with the live axle setup so don't discount it. Although the D2C platform does shar some of its naughty bits with the DEW98 platform which had four-wheel independent suspension so you never know.