Nintendo did the right thing here.
1. Reggie went on record saying that ANYTHING goes: you can use any controller for these games, Wiimote, GC, whatever. This is a big change from their previous idea that new content would have to showcase the innovative nature of the Wiimote in some way. Bravo there!
2. The 6 month delay is intentional. I have no doubt that Nintendo could probably roll this out next week if they wanted, but they aren't. Know why? Because if they did, Capcom, Konami, Namco, etc. would all roll out their games and in 5-6 months when ACTUAL indie games arrive, they'd go in completely under the radar, buried in a pile of existing games from big name publishers who can market them.
In other words, Nintendo said, "No" to big money in favor of helping indie devs along, and that takes balls, big, iron balls, ones which many indie devs will be eternally thankful for.