There has been zero discussion of that. The 220 doesn’t even do a single revenue flight into or out of ATL, and I don’t think you’ll see it for a long time. The 717 covers the short stage lengths that warrant 110 seats, and anything longer that the 220 is good on has enough connecting demand through ATL to justify the seating capacity of a 737 or 320/321.

I don’t expect there to be an ATL 220 base until after 2030 when the 717s finally get parked.