Well, good news/bad news on this front.
I'd found out about this at the Cybertron.ca forums (where I hang out for sightings local to Canada and other such things), but was since corrected that March 20th is apparently the pre-order date. Whew!
On the down side, I'm hearing that
current events might have raised the price of
the Carnivac/Fisitron 2-pack on Amazon to $95, so who knows if getting it will still be viable by the time it comes out... but apparently others are more reasonably priced, so IDEFK.