The character was first introduced as Miles Warren in 1965’s The Amazing Spider-Man #31, where he was a professor of biology at Empire State University.
Upon meeting Peter and his then-girlfriend Gwen Stacy, Miles developed romantic feelings for Gwen and became jealous of Peter.
After Stacy was killed at the hands of the Green Goblin, Warren blamed Spider-Man for the tragedy and vowed revenge, adapting the alter-ego of the Jackal.
One is the Jackal is being teased, only the filmmakers are going to gender swap the character and have Spider-Man face a female villain.