What i want to see is more Basketball and Football games. Like NBA 2k11, NCAA Football 10 or 11 and Madden NFL 11.
Three of the 4 games you listed require Online passes to play. So they will NEVER come to Games on Demand.
That's alot of tags you've got there.
I usually go for the X-Box originals on demand if anything because there hard to find but for 360 games on demand you like boogymaan said your better off going to your local game store.
You'd be better off buying them at a store, cause you'll end up paying either close to or cheaper the amount of price thats on the games on demand.