The top three teams will likely still be Real Madrid, Barcelona, and Atletico Madrid next season because the other teams in La Liga still don't have the depth of their squads that those three teams mentioned. However, on the other hand, I also hope Atletico Madrid can create a different kind of competition next season so that they can pose a serious obstacle to Barcelona and Real Madrid in the race for the La Liga title next season.
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the three clubs have dominated la liga in the last decade, both in terms of the number of titles and consistent performance in the top flight. indeed, other teams sometimes give surprises, for example like girona who were able to get the top 3 in the 2024/2025 season. but that's just once in a while, still real madrid, barcelona, and atletico madrid are the top three in la liga.
for the 2025/2026 season, it seems that this will be a pretty tough season for atletico madrid, because real madrid and barcelona are really stepping up their game this season. but even so, atletico madrid also will not let the two teams can get the la liga title easily, they will also certainly provide strong competition.