During the Super Smash Bros. Ultimate Direct, two new Echo Fighters were revealed. They are Chrom and Dark Samus. Chrom is an Echo Fighter of Roy, while Dark Samus is one for Samus.
When Chrom and Dark Samus was revealed, it was noted that these two characters will both be slightly different than the original versions of Roy and Samus. They will have different voices as well.
In addition, details were revealed about how Echo Fighters will be displayed in Super Smash Bros. Ultimate. You can have them appear as their own separate icons or stacked with the character they are an Echo for.
Super Smash Bros. Ultimate will come to the Nintendo Switch on December 7, 2018.