While bringing her back to life would be complicated, she would hardly be the first character to come back from the dead, and Mighty Thor came back to life in the comics, further justifying this prospect. Outside the in-universe canon, being played by megastar Natalie Portman definitely adds strength to the case for Jane Foster's inclusion. A female Avengers or A-Force squad would need a heavy hitter like Thor, so including Jane Foster makes a lot of sense. Even though she didn't survive the experience, ending in Valhalla means it could be possible for her to join her fellow female MCU heroes in a new Avengers team.
The Thor movies went through a major change when Jane Foster wielded Mjolnir in Thor: Love and Thunder.