While a few game enthusiasts scoff at most of the DLC tie-ins we see in games, Rocket League's tie-ins seem to be pretty properly obtained. The reasonable pricing of these tie-in DLC packs combined with the fun of playing football with cars just like the Batmobile or the DeLorean lead them to the type of add-ons that lovers aren't involved about spending a couple of dollars on. If they show famous enough, then they will result in greater promotional DLC in the future, and greater alternatives in Rocket League without a doubt is not a awful factor.
https://www.lolga.com/rocket-league/trading-prices