Update 5-2-2020: Official dummy pack image added. Features Gigantamax from of Centiskorch.
The fourth Sword & Shield set has been officially listed at stores for April 2020. It's set name will be based on the earlier trademarked Explosive Walker. This set will most likely be part of our August 2020 set in the future.
This set will contain 70 cards + Secret Rare cards. Currently there is no Dummy pack art of this set, so for now we can only speculate based on the set name. The set name could refer to the Gigantamax form of Coalossal.
It will release on April 24, 2020.
More information will likely be announced after the second main set, S2 Rebellion Crash has been released. Of course, we will let you know when more information is available about this set.