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User blog comment:Master Sima Yi/Assassinews 05-08-'14 – Assassin's Creed: Rogue announced/@comment-95.176.185.71-20140913162809/@comment-13471981-20140913174633
Those 10 studios are putting most of their time in Unity. Rogue only has 5 or 6 studios attached to it, I think.
Consider it like this: be skeptical and go in with low expectations and you might be pleasantly surprised. Go in with high expectations and you're setting yourself up for disappointment.