I for one hope not
I've always been against the MSR boondoggle. It's an expensive one shot mission whose return is so limited it's not worth the bucks spent that would kill other missions. And it's too complex and likely to fail. If you're gonna do MSR do it decades later with either geologists or with a super rover capable of long traverses and climbing down overhangs. Ain't gonna happen soon. There's lots of great science that multiple rover missions could do at the same price. Drop one in the canyons.
Remember all the excited posts here and on MSNBC that had MSR occuring by 2007?