The "general rule" is that Spydero hopes to have any knife which appears in a given year's catalog in dealer's hands before August of that year. Most times they make it, but then there's the Yachtsman, which appeared in the 1986 catalog and has still not made it out the door.
The Native IV was not one of the models Sal specifically mentioned as "coming soon" in
this thread. It also is not among the models a couple of the dealers who take "pre-orders" for Spyderco knives have on their pre-order lists. Given those two things, I'd guess the Native IV is still at least several months away. The "good news" is that once they're out, they should be available from any dealer who carries Spyderco and, unlike your S90V Para 2, they'll be regular production, so they should stay available for quite a while.
Paul
My Personal Website ----
Beginners Guide to Spyderco Collecting ----
Kiwimania ----
Spydiewiki
Dead horses beaten, sacred cows tipped, chimeras hunted when time permits.
WTC # 1458 - 1504 - 1508 - Never Forget, Never Forgive!
It's easy to grin when your ship comes in and good fortune and fame are your lot, but the man worthwhile is the man who can smile with his shorts twisted up in a knot. - Morey Amsterdam