Also..Sega just confirmed it's merely Gearbox trying to shift the blame:
Ex-Gearbox dev in May 2012: "I am expecting [Colonial Marines] to be average at best." http://j.mp/128hvRz
Also said "development of that game has been a total train wreck," and Gearbox only was handling multiplayer, with TimeGate as primary dev.
Stumbled on that post months ago. Didn't put much stock in it, but this early scores might suggest he was right.
Hate to say it, but I wouldn't get your hopes up too high for Colonial Marines. I used to work at Gearbox, and the development of that game has been a total train wreck, going on what, 6 years now? Gearbox isn't even making the game, except for the multiplayer. Primary development was outsourced to TimeGate Studios, which has a less than stellar past.
I hope it proves me wrong, as I still have alot of friends still working at Gearbox, but I am expecting it to be average at best.
Here is Randy Pitchford being more specific on how they split the development duties.