skyloft probably eventually sank back into the ground and the skyloftians became the hylians. but if it didn't, then it would make a great game if link & zelda go back to the ruins of skyloft 1000 years later
i think they should have added more upgrades for items or another sword which is more powerful than the goddess sword until it becomes the true master sword.
Final boss tips
if you are having trouble fighting Demise, get close to him and wait for him to attack, then, shield bash him and attack. don't rapidly swing at him so you have time to shield bash him again & keep going. for the second part, just sidestep to avoid his attacks and use the...