Interesting topic.
I would say that Aikido as a whole may not change radically, but it is likely that you will see more splintering, perhaps even into styles that are increasingly eclectic. There will continue to be a core of practitioners who hold to specific approaches, applications, and traditions, but I should not be surprised to see a newer generation that is inclined to create hybrid styles with an attempt to integrate cross training elements such as, say, striking arts, groundwork or Philippine style knifework. Some of these will die right off of the vine from lack of internal cohesion, others will mutate to the point that they are no longer effectively Aikido but rather hybrids that provide new matrices for various defensive concepts. This certainly seems to be the case for most other arts.
Undoubtedly, the politics of these various schools, approaches, and organizations will become increasingly Byzantine. Beyond that, I really can't provide much projection.
Krzysztof M. Mathews
http://www.firstgearterritories.com
Every place around the world it seemed the same
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