If he wants to be the Republican FDR he will cancel all price supports, corporate subsidies, shut down several federal departments, PBS, NPR and...well you know..
If he's the Republican FDR, then our era of activism could be decades away. From the time of FDR's death (1945) to the period that Democrats passed anything they damn well pleased (1965) was roughly 20 years. Now, it's possible that the Dems experienced a setback because of they wave of staunch anti-communist republicans that arrived on the scene in 1948. So we may see the period sooner (I don't forsee a young generation of Democrats arriving on the scene to demand a much stronger response to Islamofascism anytime soon).