Tough to say. Romney got the nomination this time around (just barely) on the strength of his economic background, and a perception he could win. If the economy stinks by the next election, he won’t have that.
But five years out, we are in uncharted waters with the establishment controlling things, so you could be right.
There are those on this site (many of whom I agree with) who think the combination of the liberal Romney and a Republican Congress might be a deadly combination since they will be eager to help Romney advance his agenda.
In that case, there’s no way Romney gets primaried. With a Republican Congress, the Romney DOP-E will do anything needed to run the entire slate for re-election.
We have a peck of trouble on our hands.