I was thinking of a ZC Quest that is kind of in the vein of classic Megaman/Rockman games. That is, you would start in some kind of hub and have the ability to pick which of 8 bosses you'd like to challenge first. Akin to the source material, each boss has a weakness of some kind. Otherwise, all you have is your normal pea shooter (I guess the Wand). It would do damage equal to the White Sword. Each boss would have a particular weakness and take more damage from it. All bosses would take 1/4 wand damage and be given 28 HP. Upon defeating the boss, you get its weapon, which is the weakness of another boss. The cycle repeats until all 8 are beaten, then you can go through the level 9 entrance room to the final series of levels.
Basic information:
-You start with 7 hearts (shown as a sideways classic Megaman life bar with every 4 ticks being one heart.
-Most common enemies deal 2-4 points of damage, most bosses do 4-6 damage.
-You have no shields and can never upgrade your armor
-You could get bolts from enemies (kind of rare drops) to buy powerups and stuff from a shop (like a double strength shot, E-Tanks and even a Proto Shield which would be Magical Shield strength)
-Basically, the idea is have a Zelda & Megaman hybrid
-Small health/energy capsules recover 8 units of life (2 ticks) or two units of ammo.
-Large health/energy capsules recover 40 unites of life (10 ticks) or ten units of ammo.
The only concern I have is that a lot of scripting would be needed to make the bosses interesting. Or scripting to make it so you can't buy certain upgrades without beating certain bosses (to prevent you from just cheesing the shop for all its worth). Also I don't know if a script could do this or not, but have Megaman's sprite color change based off his weapon of choice. For instance in the source material, Megaman turns birthday cake pink when he's using the Quick Boomerang but has a green and white color scheme when using the Leaf Shield. One final thing that I don't know if it would be possible or not is having each of the 8 weapons have an ammo counter that, like the original games, only is refilled from pickups, if that weapon is out. Or have some kind of Energy Balancer scripted item in to do that for you.
So basically, you start in some central hub where you can do any of the eight levels in any order you'd like. Much like the source games, it would be straightforward to get to the boss and defeat him. After that, you get his ability and either a Triforce Piece (non-scripted route) or have a script check one of the 8 bosses as defeated. Rinse and repeat for the others.
In the end, it would turn into one of those points of no return (you'd be warned). Once you go after Ganon/Wily, there is no going back to the shop to restock, so make sure you're prepared! From here, you do a series of levels. The first three would pretty much require usage of all of the items you got to make it. The fourth stage would be the rematch with all of the bosses. Afterwards, you go to the fifth and final stage where you battle Ganon/Wily and beat him for good!
I won't lie. It seems doable on paper, but with my lack of scripting knowledge, I can see it being very boring and just reliant on either boss fights being enemy warp gauntlets or using the hell out of the enemy editor.