It's only for two weeks, beginning with the 500th show. If you're going to reintroduce the Super Deal, at least make it permanent; it's not like everyone who won the Big Deal during that era actually went for it.
But really...why? I know Monty introduced it in the 1970s, but I'm pretty sure it only lasted about a season or two and wasn't there for the final year (1976-77); I also recall reading that Monty didn't like it because it undermined the entire buildup of the show -- that is, the Big Deal of the Day -- and involved risking what used to be the big thing at the end. I'm sure he loved it when the $20,000 was won, though.
Considering how the current-era Big Deal is usually nothing more than a single car or two trips (i.e., no lavish prize packages), I can see the lack of real risk. I'm curious as to what the Super Deal prize will be, though -- during the old Super Deal era, the Big Deal generally hovered just under $10,000.