With the modularity as a big part of this, it's possible that the ranger could be, at it's core, a nature-based archer guy. So maybe we see some favored enemy type stuff, and some tracking type stuff along with the usual "I kill it with my bow" kind of thing.
For those of us who want something more complex, maybe as you level you can trade out something you would normally get as you progress for some druid like spells, or an animal companion, or two-weapon wielding abilities. I think this is what I would like to see. The core ranger being a wilderness tracker/hunter with options in the same core book to blow him out into the other iconic kinds of rangers we've seen.