This argument sounds very familiar... "Sonic WON'T be in Brawl because SEGA will lose money off of every copy of Olympic Games because people are more inclined to buy Brawl". We all know how that turned out.. but anyways..
Not ALL games are in competition with each other how did you come up with that? A company doesn't compete with itself, thats a horrible argument. The company has people in charge of marketing and making sure that the games are appealing to the public. This means that Nintendo wouldn't deliberately release a game they knew wouldn't sell. It sounds like what you're saying is that everyone is entitled to buy one game and one game only and the game you buy will determine the fate of all the other games it competes with. Its a load of garbage and besides, who says that you won't end up buying all of the titles? Nintendo can practically do anything they want with Mario and Pokemon and it will sell like crazy.
By the way, if Brawl and Mario Galaxy came out on the same exact day, thats like saying one of them wouldn't sell well simply because of the other one even though they're two completely different/separate games.
If SSBB and Galaxy were both released on the same day in December, what happens?
I'm sure someone who wants both will necessarily get both.
If they have to pick one or the other, that reduces sales, and potentially damages one of theirs, or even both. Games compete for money. It's not like people aren't going to pick and choose JUST because they share the same publisher. Third party games often get hurt by bigger and better Nintendo games, so why in the world aren't Nintendo games competing for the buyer's dime?
It's basic marketing. A company spreads releases apart so there can be more immediate sales and profit. Even if you ignore the fact that all companies do this
all the time, it's not only basic marketing that says you don't know what you're talking about, it's that your insinuations contradict reality, the reality that Nintendo rarely ever puts two major releases on the VC up against each other. They're going to want to keep weekly VC launches going as long as they can, so why would they give us more huge games per week?
List of weekly releases that had more than one major game:
Launch week (obvious reason why)
And that's about it. We've seen multiple great games, but not necessarily those that will sell. And on top of that, sometimes we don't even get GOOD games in a week.