Barcelona start as defending champions, and continuity is their obvious edge. Hansi Flick appears to have a settled core, with Pedri, Dani Olmo and Lamine Yamal giving the side a familiar structure and technical control.
But stability can shift quickly in August.
If Torres were to leave, Barcelona would lose a valuable attacking option just as the campaign starts. If Rodri were to become a realistic target, that would signal ambition well beyond simple title defence.
Real Madrid appear to be taking the opposite approach. After two seasons without a trophy, the club has turned to Jose Mourinho again, and the scale of change around the squad underlines that this is more than a routine refresh.
The attack still carries elite names in Kylian Mbappe, Jude Bellingham and Vinicius Jr, but the central issue remains clear: replacing the control once supplied by Toni Kroos and Luka Modric is harder than replacing star power.
At Atletico, uncertainty appears to centre on Julian Alvarez. Reports say he has asked to leave, while Barcelona have been mentioned as admirers. Atletico are also reported to be unwilling to sell to a direct rival.
That leaves Diego Simeone, now entering a 15th season, trying to keep a contender stable while the transfer market tugs at one of its biggest forwards.
The race should tighten quickly once the first run of fixtures begins. Barcelona have the clearest base, Real Madrid have the biggest reset, and Atletico may have the most delicate dressing-room issue. The next storyline to watch is obvious: which club solves midfield first - and which one is still shopping when the window reaches its decisive days?