Where did you hear that?
IMHO the Beta is a good idea. And not only bacause I'd kill for one, but because there's still a fair amount of Mospeada fans in the far east that like us, waited many years for one good Alpha/Legioss toy (a market that Toynami has also noticed). The Beta case is even more dramatic, since a few rare toys of it were ever produced.
I don't think the interest in Robotech will fade out. After all these years the RT fanbase is still there, and IMO the same can be said of the Mospeada fans. In the end I doubt seriously that Toynami releases the Beta tho', but for other reasons: It probably won't sell as good as the Alpha, and Toynami is still a small company that must focus their efforts in make the biggest profit possible. The good news is that Tom is a huge RT fan
I'll keep dreamin on the Beta, anyway. And if this worth anything I wouldn't mind if Toynami bends the design a bit to make it possible