If our resident prophet Eugimon is right, we'll get a Mac+ Valk after the SV-51 and then a Mac0 Valk again, and as there are only two Variable fighters in Mac0, I guess we can expect the RA to be released after the next Mac+ release. So if we get a YF-21 or VF-11 in 2008, guess we might expect the RA in 2009. Sounds like a long way off.
Here's my theoretical Yamato release schedule;(based on months of research dreaming and many, many secret meetings with Yamato insiders my imaginary friend Harry.)
2007
YF-19/ FB combo, mid year
SV-51 Ivanov, mid year (which is great AFAIC cause I'll be able to order it along with the YF-19/FB combo and save on shipping )
First YF-19 repaint (probably a VF-X2 colorscheme)
2008SV-51 Nora with boosters, spring 2008
Separate SV-51 booster/ missile set, spring 2008
YF-19 weapons set, mid year
YF-21, late 2008
First non cannon VF-0 colorscheme, late 2008
2009SV-51 CF, spring 2009
YF-21 FB/FP combo set, mid 2008
Reactive Armor along with a VF-0S Roy re-issue, mid to late 2009
2010VF-11B
...
...
Note: I hope I'm wrong and we'll also see some enemy mecha and Destroids.
robodragon, Very nice work on that LV Reactive Armor, and welcome to MW!
*EDIT* Damn, I forgot to put the VF-0D in there somewhere.