Following the exciting reveal of Sora's addition to 'Super Smash Bros. Ultimate', Square-Enix revealed plans for the 20th anniversary of the series:

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As the above video shows:

• Cloud versions of 'Kingdom Hearts 1.5 + 2.5 HD ReMix', 'Kingsom Hearts HD 2.8 Final Chapter Prologue', and 'Kingdom Hearts III' (with the ReMind DLC included) are coming soon to the Nintendo Switch!
• Multiple merchandise to celebrate the 20th anniversary of the series!
• The rest of the 'Kingdom Hearts: Dark Road' story (up to the ending!) will be released this winter in one go!
• A Kingdom Hearts 20th Anniversary Event will be taking place! More details to come at a later date.