They really COULD.. give us the last chronological story as the next game... it wouldnt mean it would have to be the last Zelda game ever made... since the FIRST Zelda game isnt even the first in the timeline... I personally would love to see how it all ends.
Yes they could.. I imagine the last story would involve Link un-shattering the time line and once and for all stopping Gannon and evil "reincarnating" the tool to do so would be the mastersword we already know it has power over time.. But I don't think we have seen its full potential yet.
I threw this together for my Facebook cover.. thought maybe some of you would like it too.. perfect for the Halloween season.
Download the full sized thing here http://irishmile.deviantart.com/#/d5eb2em
what it looks like.
I have heard this theory plenty of times, its a bit of a leap in logic sex will not heal wounds it is however a good cardiovascular activity.. Jumping to the conclusion that she is a potion lady seems more logical because we have seen that method of healing previously established...