9. Aurra Sing
Aurra Sing had only the tiniest of live-action roles in The Phantom Menace, but would find new life as a member of The Clone Wars animated series cast. It was in that show that she teamed up with a young Boba Fett to try and get revenge on Mace Windu. Her somewhat ageless appearance means that it wouldn't be beyond the realm of possibility for Felicity Jones to take on this role in the spin-off, especially if it really does focus on bounty hunters. For fans of The Clone Wars, seeing her reunited with a now adult Boba would be great fun, and a nice way of continuing that story even if it's in the loosest of ways. Aurra Sing would result in a drastically different looking Jones, but the fact that there's never been a definitive live-action take on the character would give her at least some freedom and would just be a really different and unique kind of role for the British actress to take on in the movie. The fact that Sing has already been well explored in The Clone Wars makes this somewhat unlikely, but if there is interest in revisiting the character, this could be where it happens.