It looks like the 4.0.0 update for Smash Ultimate will be releasing on July 31 with The Hero from Dragon Quest.
Update: The tweets now state "within 7 days" which could mean that July 31 was the originally planned date before a delay. Either way, it looks like we'll be getting access to the 4.0.0 update and The Hero before very long.
#SmashBrosUltimate replays created in versions before 3.1.0 are not compatible with 4.0.0, which releases within 7 days. If you have replays you want to keep, you'll need to convert them by going to Vault -> Replays -> Replay Data -> Convert to Video before updating the software.— Nintendo of Europe (@NintendoEurope) July 29, 2019
The official European Nintendo Twitter account appear to have posted an early message revealing that the Smash Ultimate 4.0.0 patch release date will be July 31, just two days time from now. It’s highly likely that this will include the launch of the next character for Super Smash Bros. Ultimate, The Hero from Dragon Quest who was revealed at E3 2019. The tweets were swiftly deleted but, as ever, internet users were swift to screencap the date before it was taken down.
July 29, 2019
The updated tweets now just read “Coming Soon” which could indicate the date wasn’t finalized, but given it was posted across several European accounts, it seems more likely that the reveal wasn’t intended just yet.
Ver 4.0 of Super #SmashBrosUltimate will arrive soon! This update will include fighter adjustments, meaning replay data from previous versions will be incompatible. Convert your replays by going to Vault -> Replays -> Replay Data -> Convert to Video, before updating.— Nintendo Versus (@NintendoVS) July 29, 2019
The deleted tweets followed news of an upcoming video on July 30 in which Super Smash Bros. Ultimate director Masahiro Sakurai will give a detailed, 22-minute look at the new fighter. That video’s due to be aired at 6am PT (2pm BST), and will likely confirm the release date for The Hero DLC character.
The Hero will be a sword and magic fighter, possibly similar to the Fire Emblem series’ Robin. He makes use of a randomly-selected pool of spells each time he uses his neutral special attack. He sounds like a tricky character to master, but by this point in Ultimate’s life, we’ve no doubt players are eager for something new to learn. If you’re keen to try out The Hero for yourself, you’ll need to purchase him on release or have picked up the DLC Fighter Pass that also includes access to Joker and, at a later date, Banjo-Kazooie.
Along with new characters like The Hero, Smash Ultimate’s big updates tend to include a large number of balance changes, which means the esports community will no-doubt be keeping a close eye on the results to see how their favorites will shift up and down in tier list placements. Stay tuned for more information when the new video releases tomorrow.