Veronica will totally go after Jason because fuck him man. She'll be going it alone, or with help from her "partner" Mitchell. Others are welcome to join in, she might as for help. Her invisibility powers will probably be a big help in this. Although she runs the risk of using it too much if she's not careful.

All in all, she'll probably hold her own against Jason, but will die quickly if there's no one assisting her.