see, we can both jump to conclusions...
BG is good enough, tied to residential/office network, and hard to notice the benefit of N.
B is quite slow dude. G is fine. The benefits of N are faster transfers between nodes in your network wirelessly. Send/receive files 5-6times faster within your network. Internet access, as always, is only as fast as your ISP allows.
The "classic" Mega Man series jumped the shark in the NES era, and Mega Man 9 wasn't even as good as the NES series at it's absolute worst. If you're going to make a retro-style game in this day and age, you should at least try to match the source material in terms of quality. If 9 was released on the NES alongside the other games, it would be long forgotten by now. I'm not expecting no. 10 to be much better.
Research is to see what everybody else has seen, and think what nobody else has thought.