You can't have a real Metal Gear without Snake.
Anyway when's the last time anybody remembers a large corporation that actually resisted milking any kind of franchise for all the money they could get out of it? They might stop once they have driven it into the ground like every other type of good artwork in this world.
Sony
they don't milk their games,they give ample time for their games to be perfect and very detailed
Blizzard
they give ample time as well.things have changed after they decided to split SC2 into 3 parts but i wouldn't blame them alot as bobby kotick leads the company after their merger
Bioware
very good studio.ea might run it into the ground though
Kojima Productions
Kojima wants to do something else but Konami wants them to milk MGS