key word is "planned". If they sell like crazy (which they will) they'll definately make more. Hell i bet WaW only had 1 planned from the start, but those are selling insane amounts, so naturally, there's more.
I'd much rather have quality than quantity. It seems that most of us agree on here that is the case. I only got to play 3 of the 4 off the variety pack as I never played cage match or team taticial so killhouse was never in rotation. Chinatown I skipped any chance I got after about 3 times playing it, and Creek I could take it or leave it. The only one I enjoyed was Broadcast. But is just me...others I'm sure feel the exact opposite.