Take the example of US and India, US and India can share the global environment, India may be left as the only major super power in the IOR(Indian Ocean Region), whereas US can tighten its stronghold in other parts of the globe diverting its resources here, leaving this South Asian Region under India. This works well for both the countries. And seeing as US now regularly asks IN for security for its ships crossing the IOR, the above design seems in the offing. Reducing the USN's role here and thereby diverting resources elsewhere. Helping India get anything and everythig that it requires along the way.Kind of the way UK and US are now. Thus both the nations become unchallengeable. Any threat which India deems as very serious will result in US deploying its Navy or other forces here to aid India.
Wouldn't it all be great if it was so simple? India? Superpower? Regional may be but even that would take atleast a century at the current rate. Yeah I know its a wet dream many Indians share; that the US somehow is going to confer a type of alliance on India that is just like what UK and US share or what NATO is all about; my two cents, dream on! People who think about such possibilities have no regard for practical geo-political implications and frankly speaking, dont exactly know the depth of UK and US relationship. If anything, Indians should be first looking up to the Japan-US relationship as a benchmark for now. UK-US is way beyond!
Oh! And not to forget, Pakistan is already a MNNA of the US.
Besides, lets not discount the Chinese; who definitely plan on being in the Indian Ocean .
Now take the example of Russia and India. Russia has absolutely no plans to engage actively in S.Asia. So what if a mutual relationship is forged wherby Russia is active in its relative region and India is active in its relative region, thereby reducing US influence in both places.And an treaty of friendship with which any attack on one nation will cause the other one to join iin the fray. Thus, ensuring both nations remain risk free from any other country.
Russia has NO plans to engage actively in S.Asia, really? What would you term the Russo-Indian relationship that has been built up in all these years? What would you term Russia trying to send overtures to India to buy its aircraft for the MRCA deal or else, by allowing RD-93 engines to be exported to Pakistan for example? Just because Russian navy or for that matter its other armed forces lack the reach to exert influence in the S.Asian region doesn't mean they lack the political/diplomatic resolve and/or leverage to do so.
Unfortunately, your naive view of world politics doesnt hold much ground. Your 'imagination' that Russia be left to be active and thereby dominant in its region certainly doesn't hold true. To this day, Russia and US are slugging it out in the former Soviet and Balkan states to gain leverage on the control of the extensive energy supplies. I dont see how US can simply sit back and let Russia make in-roads.
India and China on the other hand are a more complex design.But like everything else, if there is a basic level of trust b/w the nations, it CAN be achieved.
The geo-political world does not function on 'ifs' and 'buts'. Ground reality is, there certainly can never be a relationship between China and India that would even begin to emulate, lets say, the Canadian-American scenario.