They already went over most of the new features:

- Maps are dynamic and multi-layered. Plants grow and expand, weather changes, you can fall through floors, punch monsters through walls, collapse buildings etc.
- Tons and tons of new spells and better balancing
- Tons of new bosses
- More maps
- New game modes
- Combination cooperative magic spells. For example in the video being able to punch an team mate with a giant arm while they are in a ball spell.
- Can jump and double jump
- New sacrifice levels, can sacrifice, save or neutral sacrifice (not much info on exactly what this is yet)