Well their press release does offer some promise of hidden treasures:And for all we know the Eidos game could take over half the run-time if they want to showcase various gameplay features.
“Rest assured we have plenty that will definitely make you go ‘ooh' and possibly even ‘ahh’, but we’re going to keep the line-up mostly under wraps for now. After all, we don’t want to ruin the fun.
With that in mind, here’s a tantalizingly vague list at what you can expect to see”