They did it before with Super Smash Bros. Brawl, but not with GB games. So its almost 100% sure that they did a "GB Virtual Console" only for this games, it will be usefuk because its possible to exchange the rom inside the *.wad and in the majority of times it will function perfectly.
Now for me its useless (the method that I explained, not the game), since you can simply download a GBA emulator for Wii and play all this games.
Now about the game, I plan to pick it in a near future since its a real new game, not a SNES game in a DVD (Yes Super Mario All-stars 25th, Im looking at you, they not even updated the copyright in the title screen)