Splatoon will sell MINIMUM 3 million lifetime, 5 million is possible as well.

[MoHasanie]

Why do you compare it to Titanfall's second month? Splatoon only came out on May 28th, so it was on sale for 3 days in May. Titanfall came out on March 11th, so it was on sale for 21 days in its first month. So its not surprising at all that Splatoon sold more in its second month.

EDIT: Sorry, I misunderstood what you said. Ignore this post!