Leyou owns SNK, Splash Damage, and Digital Extremes, also a 20% stake in Certain Affinity, and Sony would apparently have the option to buy 100% of Certain Affinity for around $150m if they bought Leyou. This would be a big move by Sony for sure. I'm guessing they are doing this because they are concerned about MS going for WB, considering the rumors that WB wants to sell their gaming division with several parties interested?
I think it's a mistake to think of this as some reactionary move to rumours. Leyou's market value is above $1 billion which is not pocket change, and every entity Sony can get from this deal is not accustomed to console development.
If anything this is a far wider player happening that Sony have talked about in the past. Digital Extreme is in Canada, a place Sony has no studios. This deal will include mobile, PC, multiplatform, MP, shooter and F2P experiences.
I imagine some studios like Splash Damage will just become another PS entity, but this move isn't only for PS development, not at that price.
As for SNK, I wonder if they do truly fall under this deal. That would be an interesting get. Still, we don't know if Sony goes through with this, or if Leyou choose another bidder.