Some things I'd like to mention. The reason Japan isn't listed as a potential superpower is because they lack the ability to project military power throughout the world, which is one of the key aspects of being a superpower. They have no nuclear arsenal, and according to their own constitution they're not allowed to use their military for anything other than defending their own country. There is far more to being a superpower than having a strong economy, but even then, their economy has been seeing stagnation as of late whereas India, China and Russia have been seeing economic growth of 8%-11% over the past few years.

As for Russia and India being failed states, that's not true either. Just look at this list. Neither country is listed. 

And perhaps you saw those other links I posted about poverty and education. Russia has far less poverty, and is far better educated than China. You grouping Russia in with India in terms of poverty and education just makes no sense at all when you look at real world statistics and real facts.

So I hope you didn't take my reverts the wrong way, but as I've shown you, your edits do not reflect "common sense" as you put it, and they do not reflect the real world. Please, in the future, just use the discussion page before making controversial changes based on your point of view, and we can avoid this whole mess. Force is usually not the best way to get what you want here on wikipedia.