That's literally what I thought as soon as I saw her hit with the motorcycle. I think it would be a way to get her out of all this so that Luffy can eventually fight Kaido, as two yonkos would be way too much to deal with.
Regarding the chapter:
At this point I think BM has been done so dirty and humiliated so much, her Yonko Aura has been revoked for me. I just can't take her seriously. Can you imagine Akainu or the Gorosei being humiliated as much as she has? King knocking her down, memory loss, Queen capturing her, her being unable to catch Nami and others etc. She's become a joke character for me.
Quite disappointed in the chapter itself as I wanted to some action. I absolutely can't stand some of Oda's story methods and at times It's horrendous. So much off panelling, build up and such little substance. I got sick and tired of it a long long time ago. I wouldn't be surprised if the Kaido vs Scabbards is off panelled for most of it.