I have a feeling that Nintendo cancelled Metroid: Federation Force, Project Robot, Project Guard, Lost Reavers (in the West), Genei Ibun Roku (in the West)

[midrange]

pokoko said:
So ... these games weren't meant to be games even though they were called games, had demo booths, and were given release windows?

Story checks out.

This

they were treated as games. They were given release times with other retail games. No major company, much less Nintendo, publicly announced this much for a concept work/mini game. We can only assume that Nintendo actually meant to release them as games and they either got delayed or cancelled