Not that anybody cares, but perhaps there can be a fun dialogue here. Some of my picks would've required changing a prospect here or there, but that's not really a big deal in my eyes.
These are the players I'd have chosen for Future Stars cards:
AL East
Yankees - Clarke Schmidt
Red Sox - Bobby Dalbec (though Jeter Downs seems like a far more fun player to use, but he's not even expected til 2021)
Blue Jays - Bo Bichette
Orioles - Anthony Santander
Rays - Yoshitomo Tsutsugo
AL Central
Indians - Oscar Mercado
Twins - Luis Arraez
Tigers - Casey Mize
Royals - Brady Singer
White Sox - Luis Robert
AL West
Angels - Jo Adell
Astros - Jose Urquidy
Rangers - Nick Solak
Mariners - Evan White
A's - A.J. Puk
NL East
Braves - Mike Soroka
Mets - Andres Gimenez
Marlins - Isan Diaz
Phillies - Alec Bohm
Nationals - Carter Kieboom
NL Central
Brewers - Keston Hiura
Cubs - Nico Hoerner
Pirates - Mitch Keller
Cardinals - Andrew Knizner
Reds - Shogo Akiyama
NL West
Dodgers - Gavin Lux
Giants - Mauricio Dubon
Padres - Mackenzie Gore
Rockies - Ben Bowden
Diamondbacks - Domingo Leyba
Obviously not all of these choices would be the top choice, and a number of them are used as prospects. I tried to pick players that are already in the majors or project to be in 2020. This is coming from a Brewer fan, so if there's a player you feel would fit better for your team, by all means, throw that name out there.
Edit: I changed soon to 2020, because I was not considering players who would very likely not be in the majors this year (under normal circumstances). So, if they're projected 2021 or later, I'd be more inclined to include them in the prospects series.