Slimebeast on 10 January 2011
Anyway, I don't believe Halo 3 to have had a $200 mill marketing budget and even $100 mill is far too much when I think about it. Calculated revenue for a Halo game (from Microsoft's perspective in 2007 before release) would have been roughly 10 million copies times $20 per copy = $200 mill, so a sane publisher wouldn't spend half of that on just marketing, no way.
So $50 mill (or less) is reasonable in my opinion. I'm just thinking out loud here now and rambling.
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