I was thinking along the lines of Rock5Easily's Endless hacks, but one that begins with the startup to Wily's Tower, including the weapon configuration screen; and then encompasses both WT and the OG trilogy in the batch. (And if nothing else, to bring back the awesomesauce NES-style Magnet Missile! Wily Wars flat-out *killed* it!)

Another, longer alternative could be such a hack of "Rockman Complete Works" for PSX - but that depends on if it's an actual compilation title, or an emulator front-end that references the NES ROMs independently - because then, the weapons would change in every screen, no? ^.^' Plus, jumping/walking speed would be inconsistent - in early titles, a well-timed jump would get Megaman across a 4-tile gap, but in 5 or 6? No dice.

At least Wily Wars, for certain, is self-contained, and having 18/21 robot masters and that many sublevels in a single title would be very cool to see.