It's certainly debatable which of the precon commanders is better, but both also play great in the 99s of the other, so don't worry about it too much.
There will also be Sidequest cards, cards that transform when you meet certain conditions, sagas that reflect the power of summons, and more
Cards from Attack of the Vine will be immediately legal for tournament play
It has the potential to see play in land-ramp decks without any other energy support, although there are probably better effects to cheat out permanents in green
Adventures are back once again, with many creatures providing powerful two-for-ones, and this time we have some multicolour versions for the first time
Next is a remake of a previous card and our first legendary Zombie