For obvious reasons I explained repeatedly, badminton, and many other sports won't ever have the level status as the tennis, soccer, golf, boxing etc. It's up to one's made belief to take this reality or ignore it.
I don't see it as any responsibility of one single nation to upgrade the level of competitiveness of this sport, badminton, or any other things in this world. It will be up to each nation to strive to increase its competitiveness. Japan is a good example, they invest in Park Joo Bong for extended period (indeed for how many years have they been hiring Park), and I believe, pour in lots of cash in its badminton to grow it.
I don't think TT or badminton is facing any threat to be removed from Olympics. There are still many much less popular branches there that they'll have to deal first before dealing with TT or badminton... in fact those branches that only come into our notices once every four years. Needless to say, not only TT or badminton that needs its inclusion into Olympics, but Olympics also need popular sports to be included to attract viewers & other interest. Do you think how many population are really interested to watch those Equestrian; Fencing; Modern Pentathlon; Canoeing; Rowing; Taekwondo; Triathlon; Water Polo; and so on?
A fan of badminton will remain watching it for enjoying the superior skills of the players. It's up to each perception whether one will enjoy more the match of two so so skillful players cuz they come from different nations or a match of the highest level even though they belong to the same nation. Just ask any friend of yours who watch TT, were the finals between Ma Long vs Fang Bo or Ding Ning vs Liu Shiwen in recent WTTC anything less spectacular?
And in reality the China's dominance in badminton is not such overwhelming to the extend that other nations are unable to compete at all. We watched Japan took the TC last year. Such sheer dominance of theorized reality is simply not there, a nonexistent idea.