It's just pure guess work by me and not based on anything more then a hunch they might play. I will not be surprised if the actual lineup has none of them names, although I do think there is a decent chance of Snow Patrol as they played Y Not and Victorious last year.
While I've never seen an act on IICON properly, the stage is absolutely impressive. Also it's a big field capable of handling a ton of people, which is very rare in the SE corner.