Sorry, fellow “Back to the Future” fans. No flying cars (yet).

But take heart. Here’s a vehicle-related prediction for 2015 that has a more immediate impact:

The year will finish with more than $1.2 trillion in combined revenues from used- and new-vehicle sales, according to TrueCar.

In an entry to the company’s Insights blog (published, appropriately enough, on Oct. 21), TrueCar says the industry will likely see a 7-percent gain in combined used and new revenue this year to reach this never-before-seen height.

Pushing this lofty sum, the company says, are “the highest transaction prices on record and robust total market volume.”

So, how much of a role will used cars have in all this? Well, even beyond your run-of-the-mill DeLorean sale, they’ll play a pretty big part.

TrueCar anticipates $640 billion in used-vehicle revenue (up from $599.7 billion a year ago) with 38.4 million used cars sold, a 3.8-percent increase over 2014.

(That unit sales figure includes franchised dealer, independent dealer and private-party sales). 

As far as the current month goes, it should be fairly solid, as well.

Before the clock tower strikes 12 on Halloween night, the month's used-sales figure will likely have reached 3.14 million units (Pi, anyone?). That October sum, predicted by Edmunds.com, would beat the 3.04 million used sales the company calculated for September.

The resulting used-car SAAR for October would be 37.2 million, Edmunds says, down from 37.9 million last month.

Going back to the full-year 2015 predictions, the market may be well on its way to achieving that used sales figure TrueCar is forecasting.

According to data provided by the National Automobile Dealers Association, there were 30.71 million used sales in the first three quarters of the year, which is 1.8 percent higher than the 2014 pace.

There were just under 3.80 million used cars sold in September alone and 4.34 million sold in August, says NADA.

Both of those figures are up from 2014, when 3.61 million used cars were sold in September and 3.90 million were sold in August.