2K has confirmed via Twitter that WWE 2K18 won't have paid microtransactions at all, and unlocking loot cases only occurs via in-game currency.

　　This is certainly a nice change of pace after the microtransactions related disappointments with Forza Motorsport 7 and Middle-earth: Shadow of War.

　　There are no paid microtransactions in #WWE2K18. Info on unlocking loot cases via in-game currency is here: https://t.co/ZmJQQJ7Bin. https://t.co/ZzF42lnUrM

　　— WWE 2K18 (@WWEgames) October 2, 2017

　　WWE 2K18 is due to hit PC, PlayStation 4 and Xbox One on October 17th, while the Nintendo Switch port will be available later this year.

　　For a detailed overview on how unlocks and loot cases work in WWE 2K18, check out this excerpt taken from the official blog post.

　　MyPLAYER SKILLS

　　Unlocks and Loot Cases

　　Along with upgrading your MyPLAYER comes deeper customization. This year, you’ll be able to unlock hundreds of moves and Superstar parts to customize your MyPLAYERs as you see fit.

　　Unlocks can be earned through loot cases and progression in both MyCAREER and ROAD TO GLORY. Most Superstar parts and moves are locked from the start. Once an item is unlocked, it is then purchasable with VC.

　　There are three levels of loot cases: Bronze, Silver and Gold. You have a higher chance of unlocking more rare items in Silver and Gold cases. You can purchase loot cases in MyPLAYER, MyCAREER and ROAD TO GLORY. You will also earn loot cases through progression in both MyCAREER and ROAD TO GLORY.

　　MyPLAYER LOOT CASE STORE

　　MyPLAYER LOOT CASE OPENING

　　Reward Types and Rarities

　　There are four types of rewards that can be earned from loot cases:

　　SUPERSTAR PARTS – This can be any type of Superstar parts, from a set of boots to a Superstar’s tops;MOVES – These are grouped into sets, and often by move type, such as a Grapple Pack or Strikes Pack;VC – There is a wide range of VC that can be earned from a loot case;BOOSTS – Boosts are used in ROAD TO GLORY.In each category, rewards come in three rarity levels:

　　REWARD RARITIES

　　There are also Rare Superstar parts and moves that are unlockable exclusively through MyCAREER and ROAD TO GLORY.