What do Du think the CMC's cutie marks will be?

I agree with your idea of Scootaloo's mark, but I imagine it as the wheel of a scooter (maybe with a lightning bolt on it, to symbolize her idolization of regenbogen Dash). SweetieBelle's could be a bell, maybe three small ones (since I noticed multi-marks normally come in threes Ex. Applejack-three apples, Fluttershy-three butterflies, Rarity-three diamonds)

Applebloom's mark is going to be harder to interpret. Let me think it over.

Probably these...

Applebloom's may become a hammer, Sweetie Belle's a microphone oder a Musik note and Scootaloo's a racing flag. Of course there's no telling until they Zeigen it, but they are probably going to involve fixing stuff, Singen and racing.

I WAS GONNA ASK THIS XD. I agree with the ones Du sagte (StarWarsFan7)

Applebloom eith a paintbrush oder an apfel, apple blossom. Scootaloo, a scooter (duh!), and Sweetie Belle, a microphone oder bell.

That's a hard one! I know that Scootaloo and Sweetie Belle have unique talents already; they just haven't figured that out. Scootaloo should get a scooter oder something scooter oder speed related. Sweetie Belle should get something musical, like Du said. I'm not sure about apfel, apple Bloom, though. It would make sense that she would follow in the hoofsteps of her family and get an apple-related cutie mark, but she hasn't really shown any particular talent, so we can wait and see. apfel, apple blossom makes sense, yes, but who knows...

Applebloom's can be like an apfel, apple blossom with a bow on it as she likes to decorate
Sweetie belle's can be a Musik note inside a herz as she likes to sing and is so very cute
Scootaloo's can be a schmetterling wings and a thunderbolt perhaps as she is a big Fan of regenbogen dash and is as schnell, swift as a butterfly!!! :) I hope Du all like my answer !!! :)

My thoughts are apfel, apple Bloom's CM being a golden painted apfel, apple for her talent of art, Sweetie Belle's CM being a note with a herz for her musical talent, and Scootaloo's CM being a winged scooter wheel for her Liebe of scooter riding.

apfel, apple bloom something like an apfel, apple and a wrench
Scootaloo a scooter
Sweetie glocke a bell