As addition to this it looks like the Clear 'chase' figures are not that rare as we'd expect since Amazon.jp has them listed sparately for the same price as the normal ones 525 JYen. Of course its still the question which one you'll get but based on that information its just a gamble amongst clear figs instead of them being mixed amongst the blind boxes with normal figs. Don't think Amazon is wrong on this one since they'll have done their research before listing them as separate boxes.
On the dice shootingsystem......... I've to say I was quite shocked to see it within that video as its clearly present and not really something smoothly integrated like the rub or orb we all know. As Sylvain (Lord) explained the whole dice thingy can be taken out from the figure and MAYBE be replaced by a part (bigger dice?) that will cover the whole? The figs presented during the Tokyo Toy show clearly didn't have such an explicit dice system within them so there might be still some hope. Otherwise its a big gap which might be a trigger for companies as stickerfixer or something to jump into producing a nice element to cover the whole.
As far as I've seen there is no lightning system included in the dice.
On some of the pics we've seen 'glowing' dices which seems to be the result of a light from the back and a transparent/translucent dice that looks like its giving light while its just transmitting it.
The Grays were prototypes for sure and they'll not become available on the commercial market, who know's maybe they'll pop up over a decade as rare Takara prototype as we've seen with BB / LB items that came from Takara/Hasbro employees. Same story is valid for the 3 large BS figures that were present on the Tokyo Toy Show stand

Guess so far nobody is having insiders that are that far penetrated to be able to get to these yet........ but who knows in the future.
For now the countdown has started for sure and I'm sure that within the next days more pieces of the puzzle will come together.
BEASTFORMERS ビーストフォーマー
Collector & Founder of the Beastformers Blog

For more info about the Beastformers Archaeology (-BA-) Project please click HERE
In case you might not be able to contact The White Rabbit via LRG for whatever reason use the contact options on the Beastformers Blog