I've spent some time trying to guess what woods he'll choose. It's likely they won't be the heaviest/densest woods used in the Ori (using those woods would require a different thickness profile of earcup wood, in turn necessitating a new CMC set-up). Not impossible, but harder than simply using woods reasonably close to the current padauk & cherry.
When I was emailing back & forth w/Zach in process of ordering my Ori, I raised this issue. He said he was thinking of different woods sometime in mid-2017, and mentioned teak as a possibility. I briefly lost consciousness reading that (!!) ... imagining a teak
anything from ZMF. Teak isn't terribly hard, but is relatively dense & somewhat difficult to work due to silica embedded in the wood (dulls blades quickly).
But there are other possibilities. This picture shows 3 other woods previously used in Omni/Ori production:
I suspect (based on other email comments from Zach last year) that black limba is difficult if not impossible for him to get right now. Too bad--it's pretty w/striking grain & color variations.
My pick of the 2 remaining would be Zebra Wood: it's very slightly less hard/dense than padauk (good for A&E)--and it's just gorgeous. Also, Zach used this wood relatively recently (end-of-year discounted Ori), so it's likely he has supply.
I'd kill for an Atticus in ZB (or at least slap someone w/moderate force). Here's another picture (a Zebra Wood Omni) w/more realistic contrast. It's really not far off ormosia henryi, is it?
Brazilian Rosewood is also very pretty IMO (I'm wearing a drool guard just to look at this picture). But I'm reasonably sure BR is much heavier/denser than either padauk or cherry, so not an easy pick for Zach.
(Zach, if you're listening: teak or zebra wood Atticus, por favor!!)