Here we have the 3rd most popular Wonderbolt, who perhaps got a nice popularity lift thanks to her hilarious (and possibly head-wound inspired) crush on Big Mac in the official comic. We don't know too much about Fleetfoot, other than that she's possibly the fastest of the Wonderbolts (as seen by winning the Derby) and that she's a surprisingly good stalker despite wearing a loud spandex flight-suit. I'd be happy if she became a recognizable, recurring addition to the flight team's roster in the show itself though.
As for the team itself, I suspect we'll get some further developments on Dash's dream to join them in the coming season... "Wonderbolts Academy" had a rather ambiguous ending making it a bit unclear just what Dash's status was. I understand that ending was rewritten at some point, possibly to purposefully leave room for further exploration once they knew they were definitely going to do a Season 4?