End of the year Xb one should have an install base of about 20 million. I expect UC4 to sell about 7 million. Attach rate for Halo 5 will need to be about 35%. Halo's best attach rate ever was Halo 2 with 34.4%.
Can Halo 5 really achieve a better attach rate than Halo 2? I don't think that's likely. But because of the nature of Halo, Halo 5 will have the highest attach rate behind Halo 2 by the fact that the Xbox 360 Halos are on a console that has a far higher install base than Xb one will ever achieve.
UC4 LTD will most likely be achieved in 2017, by that time PS4 should be well over 50 million. Giving a 7 million UC4 an attach rate of a quite achievable 14%
“The fundamental cause of the trouble is that in the modern world the stupid are cocksure while the intelligent are full of doubt.” - Bertrand Russell
"When the power of love overcomes the love of power, the world will know peace."
Jimi Hendrix
