Nintendo has already teased that the first patch to come to Super Smash Bros. Ultimate will be arriving onto Nintendo Switch systems sometime throughout next week.
The news comes from a notice message sent out to every Nintendo Switch system, the message says that update 1.2.0 would be arriving sometime "next week." The majority of the contents for the update are unclear, but what we do know is that once the update is downloaded and installed into your systems all in-game replays that were saved to Ultimates game files will be removed.
To save the awesome kills that you have already done, players will have to go to their Vault in Smash UItimate and navigate to the replay data section and re-save the replays into videos to your Nintendo Switch storage. Doing this will save your replays but in turn will take up quite a lot of storage on your Nintendo Switch or microSD card. I would advise players that want to save all of their replays and have quite a few of them to make sure they have enough space on their Nintendo Switch or microSD card before attempting the transfer.
I have noticed on forums and on the Smash subreddit that many players have already been calling for a balance patch to be issued out to the game with the goal of buffing and nerfing select fighters. Personally, I believe that it is much to early in the lifetime of Ultimate to determine what characters are overly strong and what ones are too weak. An example of why I believe this is because even many of the pro-players are still discovering new aspects of the game, and as they find new ways to do things it dynamically makes changes to what is considered strong and weak. Simply put, a fighter balancing patch is certainly not needed, especially as of yet.