Well THIS link says they ARE having Madden 15:
http://sdccblog.com/2014/07/xbox-ann...offsites-more/
At Xbox’s Booth (#100) and at the previously-announced Xbox Lounge at the Manchester Grand Hyatt, attendees can swing by for a chance to try out upcoming titles that won’t be heading to Xbox One consoles until later this year, including Sunset Overdrive, Madden NFL 15, Skylanders Trap Team, Lego Batman 3: Beyond Gotham, Evolve, and many more.