I love Saab-built aircraft, (maybe a bit biased bc I live in Sweden) so I would love to see the JAS-39C Gripen in MSFS someday, I heard some third party devs were developing one but I don´t really know that much about it tbh.
Howver, I also really like old warbirds, so the classic Viggen, Draken or Lansen would also make a fantastic addon!