Skill based Bowser minigames returning, losers losing items or coins/ministars: Yes, I like it better than reverse/battle.
Individual movement and Classic Mode back: Yes, though having both Car Mode and Classic Mode will be nice.
Custom Minigame list from Mario Party 4: YES! This is a must-be!
No rubberbanded dice, unless it was optional (it was in 9, but not always): I don't care about dice blocks.
Captain Events: OK, but it could be less luck-based.
4 Player Co-op minigames: Yes, and I hope there are at least 3 or 4!
Minigame Island/Coaster from the first two Mario Party games: Yes- but hope it doesn't have things like World 7 like Minigame Coaster.