Nintendo is not going to abandon their major console franchies for mini game collections.
SMG's sales are not impressive but they are not disastrous either. I don't get why people are trying to spin SMG's sales to be successful. Second week sales almost always see a drop, which baffles me as to why people think it is going to push out another 250,000 from 11/5 to 11/12.
The worst case scenario is that we see Nintendo place greater focus of traditional franchises on its handhelds and for consoles, it is something like fan service to rope in a few hundred thousand fans. Which would be fine by me. Handhelds are getting to the point where they are not drastically behind consoles. PSP2 and DS2 will close the gap even further.
Ace Combat 6's sales are considered good because anything that sells over 25,000 its first week on Xbox 360 is considered good. AC6 will struggle to get past 100,000. It would be miraculous if it went over 150,000.