Well I could go for Isenguard to have a bit of practice before the campaign, or I could do Elves if you wanted to try the baddies. Can just roll fro one of the scenarios in one of the booklets on the day.
40K - Dark Angels, Dark Eldar, Necrons; Lord of the Rings - lots; Bloodbowl - Dwarves, Wood Elves; SAGA - Anglo Danes & Welsh; Guildball - Morticians, Engineers; Dropzone/fleet - Shaltari