Big Mom will wreck Ulti and Kid will probably step in and save her. Kid could just shoo Ulti away and/or Page 1 gets back up and tell her to forget Big Mom.
There's thousands of ways that this could go, but in the end the story has heavily implied Ulti will be defeated by Nami, so she...
Kaido and Luffy will go on for hours, Kaido needs to be beaten in front of it's citizens and Onigashima is nowhere near the capitol yet.
Expect this go o like the Katakuri fight, most of it will be offpanel while other stuff is happening at the same time
Law escaped exactly a week before the raid, and his attacks have never been portrayed to have been Yonko level.
You're reaching hardcore to give the carpenter an excuse. Go re read chapter 954, the countdown to the raid started after Law escaped