I think if it comes down to a straight out battle between a handful of clubs next summer with his clause active... he will go to Madrid. Think its so obvious and i wouldn't mind betting they are the club he had his eye on when inserting his buyout clause.
The only scenario where i can see him somewhere other than Madrid, which IMO would be man city, is if Madrid simply dont have the funds this summer, and City go all out
I think you are overestimating RMs chances here. PL is the best league in the world now. Liverpool's and Manchester United's supporter clubs in Norway has 10 times more members than the 3rd biggest football supporter club there and English football has higher status in Norway than any other league in the world.
ZZ doesn't trust youngsters and it looks like RM is not going to be the giant in European football that they used to be in the years to come. Zidane fields Modric, Benzema, Kroos, Ramos, Lukas, Isco, Varane etc. week in week out while RM has had some of the best prospects in football at their disposal. They could easily have implemented some of Jovic, Odegaard (a good friend of Haaland), Hakimi, Llorente, Theo Hernandez, Reguilon, Brahim Diaz, Reinier, Kubo, Mayoral, Oscar etc. (all potential WC talents) into their team, but has not given any of them a fair chance and has sent them all away (some still have a chance to make it, but you get my point). Rodrygo, Vinicius and Militao (and more) are or have been rotting away/stagnating in the squad with too few minutes while RM fields over their peak 30+ year olds.
I have us and City on the top of the list of likely places for Haaland to end up/go next.
I guess Haaland and his advisors are a little bit curious to see what would happen if you implied his goalratio (27 goals in 2122 minutes in all comps this season, 78 minutes per goal) in stead of Martial and Cavanis' (14 goals in 3262 minutes combined in all comps this season, 233 minutes per goal) on top for us, and see where that would take us in the league and CL. I am too.