YouTube
Contributed by abigstupidjellyfish
It appears that originally the geth squadmate, Legion, was going to be recruited a lot earlier in the game; possibly directly after the prologue like Miranda and Jacob. By using an editor tool to unlock Legion from the beginning of the game, players will discover that Legion has extensive dialogue for virtually every mission in the game, including missions which must be complete before his official recruitment mission. Furthermore, there are some unique scenes if you bring Legion along, such as characters commenting on his presence.
Source
Divider
Video