Bushiroad likes to innovate each year and 2019 will be no exception. The Special Series set is Bushiroad's latest attempt at shaking things up, being the first series dedicated exclusively to the Premium format. Premium Collection 2019 will include 54 cards in total (six GR, 24 RRR, 24 RR) and six parallel cards (six SGR), as well as support for all 24 clans.
It will be released on 21 June 2019 and will contain at least one new G unit for each clan, as well as an exclusive G unit for each nation. The package illustration will feature six never before seen dragons, so that's definitely news worth following for Vanguard players right now.
If you want to jump onto the hype train, be sure to check back in late May 2019 to know more about the full booster.