Just to put some context around this.
Qatar-based BeIN are the main sports broadcaster for Asia (and other regions). They paid a lot for that - this is some of the most valuable sports television in the world, and includes the Premier League, the Champions League and the World Cup. Heavy hitters.
One of BeIN's biggest markets was Saudi - football is HUGE in Saudi - and TV and online audiences there is massive, the region's biggest. The recent fallout and blockade of Qatar (a thread in itself, but essentially "Iran") saw all ties cut, and the footy went with it, across the Middle East.
After some back and forth, some GCC countries got it back, but not Saudi, which has banned the sale of subscriptions to the network as part of the economic blockade of Qatar. Enter BeINQ, who started transmitting BeIN's output to the whole of Saudi.
BeIN have never made money since they started, but the loss of Saudi was a big blow - they had to get rid of about a fifth of their employees.
The technology needed to do what BeINQ are doing is monumental - it's been operated with signals transmitted by Arabsat, a communications company based in Saudi Arabia, with at least the tacit support of some VERY powerful figures in Saudi Arabia.
Now, definitive proof of that is another thing, but Premier League are furious, they're very protective of their content when it comes to this stuff (try putting a Premier League clip on YouTube, see how long it lasts), and they back BeIN on their claims. As do FIFA.
An investigation financed by FIFA, two of its confederations and a group of top European soccer leagues concluded “without question” that a Saudi Arabia-backed satellite provider has played a vital role in a piracy operation
If beIN withdraw from the market for those rights, it could have significant financial repercussions for FIFA, its confederations, the leagues and their teams.
Arabsat, based in Riyadh, is jointly owned by a consortium of Arab nations, Saudi Arabia is by far its biggest investor. BeoutQ itself claims to be based in Cuba and Colombia, though all evidence points to its being a Saudi-run operation with the support of powerful figures in the country, including Saud al-Qahtani, a senior aide and close advisor to... MBS.
And MBS is, among lots of other things, chairman of PIF.
All that said - will it stop the sale going through? I very much doubt it, it will need a lot more firmer evidence. But it does give you a glimpse into the part Newcastle United will be playing in SA's geopolitical games from now on. Don't expect this to be the last.