If Konami ends up leaving the gaming industry entirely or decides they won't release more Metal Gear games and opt to sell the series to a publisher company/developer:
Who would you like to buy the rights to the series?
Where do you think the series could find a proper home with devs that would give the Metal Gear games the love, understanding and respect it deserves?
And why do you think the rights should go there?
Nintendo is selling their IPs to Microsoft and this is true because:
http://gamrconnect.vgchartz.com/thread.php?id=221391&page=1