Call of Duty and Destiny are entirely different games, the only thing they have in common is their sense of FPS. That being said I think the COD games have lost their drive. How many reboots of the same play-style can you create before people get bored? In terms of out-selling one-another, Bungie has a serious fan base, but I think they could struggle to sell the game to people who are already under it's spell. Whilst talking to my friends who sit there and do play COD 24/7 they've barely heard of it, and if they have they're straight up not interested. Destiny has no franchise to build on, this is textbook new beginnings.