Maybe, but I really doubt it. The only reason his ideas even remotely work is because he has a history of wackjob narratives inside otherwise (metal gear) solid games + complete authorial control over the entire product. Give one of his games to someone else to produce and they need to be exceptionally strong and resilient in the face of a team and investors that will naturally - as a part of development - be asking “what about this, people won’t like it, or it doesn’t play test well.”

The “why” for every little part of the game concept needs to exist or whoever is left in control will have a very difficult time explaining what the value is when that question is raised.

All this is perhaps superseded if Kojima names an heir in addition to passing along a bunch of ideas.

Not yet. He first has to change his name to Bigdong Foreverlive to unlock his power(s).