The Legends case cards are in priority only /30 each (60 priority cases). I have heard that each priority case also has a club heroes parallel case card. I haven’t seen this myself though.Pretty sure I saw on Gold Coast cards site, that League Leaders is the Retail case card, and Club Heroes and Legends are the Hobby case cards? Site says Priority has two case cards, but doesn't say what. I can't figure out the odds and ratios - and the prices for Club Hero case cards are sitting really high compared to past Traders (and Elite) case cards, but I guess it is those mad first couple of weeks. I'd also expect (or hope) The Creator cards ease to $60-$80.
Beyond the sell sheet I have yet to see a League Leader card posted anywhere, but I barely glimpsed them on Facebook pages last year either.
Regarding the rainbow spectrum of Master & Apprentice, there's the standard black ones in boxes, and there's the cool looking black parallel ones numbered /23, which are one of the priority box cards.
The club heroes parallel is the case card for the hobby cases. 32 cards /30 each
So, that makes 960 club heroes case cards, 900 are in the hobby cases and the remaining 60 in priority with the legends.
The league leaders are the case card for the retail product (newsagents etc). I don’t think these are actually sealed in cases and I have heard they might not be numbered this year. I am not sure how these will be distributed.