Romney's plan is to "repeal and replace" Obamacare with Romneycare. RINO's in the Congress plan to help him pass what they will tout as a bipartisan program, but they can't do so until after the election.
I think Romneycare at state level has an individual mandate. Presuming Supreme Court finds the individual mandate unconstitutional at the national level, Romney can’t have the Massachusetts state plan expanded to all 50 states.