Just buy one item for TRackS (but not a item included in TR Deluxe), use it in the free version of TR. Then if this thing does go all the way, you will have made out a lot better than buying TRD for $220. And if it doesn't go all the way, just choose fx that are not in Deluxe and buy TRD after that GB is over.
That way you can get the most for the least.
Example: Buy Sunset Sound module at $149. Then you can choose TR5 as a freebie, plus some of the best modules TR5 has to offer in the $129 range ( and you can count on this going to at least 5 freebies!) for free!! That would be the new Comprexxor, Stealth Limiter (excellent), and the Master 432 (also excellent!) and more!
You could end up with the whole shabang for $149!!