Thanks Vibs for everything you've found out and posted.
Sambala I read somewhere is a village in UP. So it would become the capital of the world (meaning just India, or the world in whichever year it is?)
So this assumes that all present day governments/state setups will be destroyed, and there will be a reversion to a monarchy? I think that's cool! Also, will Padma, unlike Sita, have a happy life, or will she have to suffer. Please tell me that unlike Rama, Kalki doesn't have any pre-existing curses following him? And hopefully doesn't incur any between now and then. And hopefully, Kalki is never separated from Padma.
One other question. Normally, when Vishnu had a military objective of destroying evil, he assumed kshatriya roles, as in Rama and Krishna, although Parashurama was a notable exception since kshatriyas themselves were the problem. But in this case, Kalki has a clear military mission like Rama, and given that, why is he coming as a Brahmin rather than a Kshatriya? (Please don't be offended by the question - it's just that since it's not a post-caste setup (or is it?), wouldn't a kshatriya role be more appropriate, like in Rama or Krishna)?