Some more development...
Now, if this gets into production, it would be the simple LttP style, unmodified. Since the letter has already been opened, that means that a new 'Hero' has been chosen and has set out to save Hyrule. Link, having possession of the Triforce of Courage, also sets out on this noble quest, and will eventually meet face to face with the new 'Hero'. That's where the conflict will begin, as Link cannot accept the appearance of a new 'Hero' while he still holds the Triforce of Courage. However, this new 'Hero' has already solved the mysteries of one scroll, and has obtained the sacred power of the Sage of Light. The Dark Lord has not shown himself yet, which is good news for the two. The new 'Hero' suggests that they travel together to keep the Triforce of Courage safe, and to protect the Sages' powers. (I doubt co-op modes will exist if this is made, due to difficulty. But it is possible)
So, Link and the new 'Hero' return to the tattered kingdom of Hyrule, to scout for the remaining scrolls. However, the Enigma Isles will not be forgotten; Link will have to traverse between the isles and the broken Hyrule kingdom to help the new 'Hero' inherit the Sages' powers and defeat the Dark Lord. (Who is not Ganondorf this time)