NHL 25 Grudge Match Reveal

You're just seeing the intro animation. That's not all that's coming with Grudge Matches. Here are some more details from the blog:

"Hockey is at its best when the competition is fierce. The all-new Grudge Match System tracks the history of matchups between teams across online and offline modes, showing relevant stats from previous meetings to add more context and stakes to the action. Grudge Match also includes Impact Players, who earn special X-Factors related to their standout performance in the previous matchups, along with new contextually driven cinematics and commentary that turn up the heat of rivalry."