I think it will looks like this kata
, but with "matter meets antimatter" results, you know: the ultimate ai uchi.
I disagree. I don't think it'd look anything like that. The people in that vid are giving up a portion of their structure to make the kata flow from one technique to another. It's a demo and I can understand why they'd do that. But, if uke and nage actually have aiki going, then it'll be pretty much a stalemate. No one will go anywhere and when they do, it'll be checked by the other person. It'd probably be fairly boring until one of them loses structure in some manner and the other is able to take advantage of it.