Watched a video of the new song and...hrmmm. After watching the Guardians Holiday Special which has a really nice selection of songs in it, it's really baffling that Disney went with a mash-up involving nothing from that special.
Put under spoiler just in case, but in all honesty, I don't think it needs it.
It's essentially a couple short electric guitar covers of public domain Christmas songs (I heard Jingle Bells and Deck the Halls, if there's more I couldn't hear it in the video), intermixed with a Parody of "Run Run Ruldolph" that is "Run Run Rocket". It all sounds very 2000's Disney Channel, and it's just kind of there.
As for the rest of the ride, there's zero changes to the visuals, effects and dialogue. This is not a Monsters After Dark situation where everything is changed to fit the overlay.
Considering how good the Guardian's rides can be with music, this feels like a legit whiff.