I just thought of something that would make me buy a Metroid Prime wiimake.

[Voltaire]

Screw the 3rd person, just adding new content to each game (new bosses, areas, and artwork for MP1, new bosses, areas, artwork, and online play for MP2), then id buy them. Of course if they included the new content, id pay some $40-50 for it. Otherwise, nothing over $20 is work, and even thats a strech.