That's a pity, would have been interesting if the Star balances could also be analyzed. It's definitely possible that card prices rise, as you said, due to higher shines requiring a good number of cards, although I wouldn't bet on it too much given that only a small subset of Welcome set cards are being played in meta decks, which may result in everyone saving their Stars until one of these cards become available.

Definitely interesting to see how it plays out once the team announces something!