So, one thing that is for sure is that neither Woj or Shams have reported that Kyrie is headed to Brooklyn. The "1 guy said something clickbait media talking heads" are the ones that have been driving this for weeks. If it were a done deal or if there were someone credible stating this, they would have reported on it.
My biggest personal tip off that he isn't coming back is that we didn't trade for AD. All said, if he comes back, I'd welcome him, but I'd be pretty furious that he didn't give Ainge that indication to trade for AD.