The details of the next Brawl Stars update will be revealed in a Brawl Talk end of the end of April.

Supercell often gives a preview of the incoming Brawl Stars update in what is known as Brawl Talk. It'll be an opportunity for many players to get an idea of all the new additions, major changes, and gameplay improvements that'll be introduced to the game over the coming two months and seasons.
The next Brawl Talk is scheduled for April 26, 2025. It'll be an exciting one to tune into, but if you can't wait, we'll show you everything we know so far about what's to come.
Gear Up for Two New Brawlers
Two brand-new Brawlers will be added to Brawl Stars – one in the May season and the other in the June season. At the moment, there have been no hints as to who they will be or what abilities they'll possess.
However, we have a rough indication of what to expect. These Brawlers may slide into one of the 13 currently incomplete Trios such as the Enchanted Woods Trio (with Cordelius and Lily) or the Starr Park Hub (with Larry & Lawrie and R-T). Or, they could form a completely novel Brawler Trio.
Hypercharges Are Coming

Brawl Stars General Manager Frank previously revealed in the game's roadmap for 2025 that, if everything goes as planned, all Brawlers will have a Hypercharge by the middle of the year.
With that in mind, we can expect a bunch of new Hypercharges in Brawl Stars. We've usually had 12 new Hypercharges in each of the past few updates, but we could see more added in the coming one.
As it stands, it's believed Doug, Griff, Gus, Kenji, and Pam are the frontrunners to receive a Hypercharge.
Possible Rework for the Mastery System or Trophy Road
In the same 2025 roadmap for Brawl Stars, Frank hinted that a rework of a key gameplay aspect may be on the cards for the mid-year update. This could potentially affect the Mastery System or the Trophy Road. If this were to happen, it would be yet another rework that Supercell has deployed over the past year.

On the topic of the Trophy Road, it was revealed that the developers want to integrate more Starr Park lore into it since the backstory surrounding players' favorite Brawlers was such a hit in the brief CCTV campaign they had over a year ago.
No details have been shared on what might happen to the Mastery System if it were to get reworked.
Expect More Skins
As always, you can expect various new Skins to be introduced to Brawl Stars in the next major update. It's been confirmed that the popular Hacker Brock Skins, released during the Cyberbrawl season, will make a return to the game.
Other than that, it's also believed that the Supercell MAKE Skin, Ancestral Belle, will finally be added to Brawl Stars.