I really wish they got Tango Gameworks after TEW2 didn't sell well.
Tango is not independent. Zenimax owns them.
It use to be, long ago, and as a Konami IP. I might be wrong, but I don't think those games originally being exclusive to PS was entirely Kojima's decision, right?
For example, look at Tomb Raider and Call of Duty. Marketing and funding can change that viewpoint of an IP being on "a side" in a matter of 1-2 releases.
Nah Tomb Raider still sells way more on PS despite the forced attempts to associate it with Xbox. Marketing and temporary exclusives can't really break decades long association.