Not an equivalent situation. Sony is a much larger company, with more employees, and massive debt. Nintendo is much smaller company with huge cash reserves.

Plus when EA deserts Nintendo Switch they could have made a new licensed baseball game like they did on the N64. Still the best mechanics in a baseball game that I have played. 

That's a lot..

Wonder if they would have made more if they held onto the team for longer, but a quick way to make a lot of money

easily more money in the long term. ticket revenue, sponsorship deals. merch profits.  

They said they selling Marines stake because they want to invest that money in other business that way more important for their core bussines, they said that money will be used for Nintendo themed parks (If I recall those parks will costa around $300-400m), movies, toys and otherNintendo merchandaise, restaurants...so not that they will only make profit from those new business but that will be huge marketing for their IPs and that will directly influence on better selling of their products. All that is huge part of their plan of levering awareness and visibility of their IPs in almost every aspect of life, so with all that on mind actualy Mariners stake is great move from Nintendo.

Yes, it isn't the same situation. But a lot of those posts were saying Sony wouldn't have posted profits without the sale of the buildings, and this would be a similar case going by the last years. And of course Nintendo case is a lot more positive, even more if they invest in what Miyamotoo posted and they generate profit.

Excellent investment selling it for 10 times what they paid about 10 years later. they must be delighted.