i don't know any rules there would be because there arent many skips or arent any skips at all so
no it would be one catigory for nxt championship (get nxt championhsip as fast as possible) mitb (get mitb as fast as possible) and world title (get world title as fast as possible)
no NXT and MITB are differnt runs they can be splits in a run yes because they come before the world title (plus for the story you kinda have to win them so)
i would say for run goals it would be NXT championship MITB and world title if you want few catigorys because you only really get 3 titles and 1 can be either ic/usa or tag team titles (you can change brands in it early on by talking to vince)
edit:also timer would start after first editing moveset for the first time
be able to speedrun my career mode heres some idea for category's NXT championship universal/wwe championship (it would be basicly the 100 percent category because whats after it) Main roster title Mitb Mitb betrayal these are just ideas but i've thought since the game came out that i thought its had a bunch of new speedrunning potential then just win a match as fast as possible
https://imgur.com/ upload it to this then put the link to it in the speedrun