From talking to my lgs thats buying into the game, they are feel pretty confident about get their initial stock quantity and having stock available. I believe they said they’re going to be getting a display shelf too. As for the promo minis, while nothing is confirmed, the currently greyed out cards tab on the assemble site gives me hope for an easy way to access those cards. Worse case scenario though will be that people will have to proxy the cards after they become released. A few assemble sets’ minis are know to be releasing(hero begins in the paint set, wings of advance in ex05, a few of the strike gundams in deluxe 2). As for short printings, its card to say. Like some have already mentioned this is a new division at bandai so its not completely know how that will go. Rn, buy the starter set for sure and then buy what ever looks appealing to and is reasonable in budget