Watching now.
1) Nightmare mode planned for hardcore players. Harder than DR1. Save in washrooms only. Time limit is closer to the 3 day limit speed.
2) They have some Capcom Easter-eggs in the game.
3) Saving is done via checkpoints and seamless in the background for all players unless they choose (1)
4) Online co-op only. SmartGlass App can be played local.
5) Big fans of the Banana-Hammock.
6) Customized Combo weapons.
7) Bigger world. Can fit DR1 and 2 into DR3 and still have space. All hand crafted.
8) Horror First, Comedy Second. If you want a serious zombie game, it is there. If you want the goofy DR fun you can dig and find it all around. The more you dig, the more ridiculous it gets.
9) Leveling system totally revamped. Was automatic, now you choose where to spend points. Skill points and attributes ahoy. Can make tank like characters, or melee weapon guy etc. More accurate with guns etc if you want to go that way.
10) Big surprises when you hit lvl 50. Insane stuff.
Will post more...