For me Phantom Pain will be the last Metal Gear, even if Konami decides to release a new one wihtout Kojima, but for now I'm worried about Silent Hills, they'll let Del Toro alone? please no lol.
I think I heard a rumour that the whole reason Kojima fell out with Konami is because he didn't want to be stuck making Metal Gear. Well, atleadt with Kojima going indie we can start to have successors to his other games