What's the chance that Kemba & his people are using the media/Celtics as leverage simply to get Charlotte to cave rather than him being truly interested in Boston?
Kemba has Jeff Schwartz and Excel repping him. I have never heard of them doing stuff like publicly leveraging one team with another, though maybe behind closed doors he/they do.
I think Walker knows how dysfunctional Jordan has been and wants a max contract and somewhere to play where the management isn't a disaster like it is in LAL, NYK, Charlotte, and Phoenix. That doesn't leave a ton of places with max cap room that also have good to great management and coaching situations that would want him back.
LAC has SGA as their future PG and are focused on Horford and Kawhi. Brooklyn has settled on Kyrie. Indy most likely is signing most of their own free agents. And Philly is concentrating on bringing back Butler and Harris and have Simmons at PG.
So I think Boston is a very viable choice and Kemba is serious about Boston and not just using the team to cut a better deal in Charlotte.