Working on a Pokémon fangame, and looking for feedback on the ideas I currently have, remake of Pokémon Red/Blue, you'll experience the Kanto journey again.
The features I have planned for it
>Mega evolution, but only after you finish the elite 4
>The ability to go to Johto, defeat their gym leaders and elite four and then fight Gold
>Some way of getting Gen 3 and up Pokémon, maybe Safari, feel free to suggest things.
>Every Pokémon will be possible to catch, including legendaries

I have two options for making the game itself
Option 1: Romhack, this option will limit what I can do with the game, but I will finish it faster.
estimated finish date would be 2017-18

Option 2: Make the game from scratch, this will not put a limit to the game, but will take way longer to do.
estimated finish 2020-21