Thorgrim Sekkrhrafn
Explorer
Psionics. Let's at least get a peak at what they're going to do with psionics.
I am not so interested in alternate rules as much as I am in additional rules.
High on my list are the rules for running mid-large groups of monsters (different from mass combat rules), chase rules, turn-based exploration rules (updated from the playtest), and possibly any other additional stuff related to the non-combat phases of the game.
Options, lots of options.
Ideally, amongst other thing, something along the lines of 3e's "Unearthed Arcana"

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.