CTR and its remake have music that's very much like the classic trilogy. I really recommend getting CTR: Nitro Fueled, it's one of the best modern kart racers on the market at the moment! I still don't like how many influencers gave it a bad name due to the inclusion of microtransactions that are easily ignorable, especially since everything is purely cosmetic.
I think Crash 4 could still get a song or a few spirits, potentially. But it is a very recent release, so unless Crash is one of the last two fighters, I wouldn't expect anything. One thing I've always wondered: Would we get the original Crash dance, or the "modern" one, where air hump is replaced with the Running Man? I mean, Mario Strikers got away with Air humping, and it's got the same ESRB rating as Ultimate.