Since it hasn't been made yet, I'll make a thread discussing the fan game I'm most hyped for, Megaman X: Corrupted by JKB Games.
Plot: We know very little about the overall plot. Just it takes place after X5.
Gameplay: It's a Metroidvania style game where mavericks are in control of different areas of an overall huge map and you have to fight through hordes of enemies all Megaman X style to get to them. X and Zero are playable characters.
Music: The music is made up of incredible pieces constructed by Nitro Titan on YT. This OST has high octane beats that are meant to keep you pumped throughout your session.
New stuff added: New armors, new weapons and new techniques.
JKB has been working on this game for years now and it looks better every update. I can't wait to play it.