Sometimes, comparisons are made between DX and BOD. They are off the mark. Hunter and HBK are two performers who are of a similar calibre, both have had illustrious careers, and DX was a great deal. BOD, on the other hand, wasn't *really* a big deal;it was fun, and cool, but a big deal, it was not. Furthermore, Kane was introduced for the sole purpose of being a plot device for Taker. Now clearly, Kane has outgrown that and made a name for himself(much to my delight) and became a mainstay and a somewhat big name. Aside from that though, he hasn't really had an illustrious career -- his career is marred with utter mismanagement by the WWE creative, and he isn't a performer on par with Taker, much less in the same league. He simply isn't. So the comparisons fall flat. The BOD was a short term thing, there haven't been any serious reunions, and rarely do they ever match Taker/Kane up as a team-- it isn't as if Taker comes out saving Kane like HHH did with Shawn. We are all sick of them facing off, as far as them being competitors is concerned.
The WWE hasn't really maintained the continuity with the whole brotherly thing; Kane and Taker just do their own thing -- whereas the WWE went to great lengths to maintain the whole BFF thing with Shawn/Hunter. It isn't really a Benoit/Guerrero thing either, it wasn't as if when Taker won his first title in years(WM 23) or even WM 24 where he closed the show -- that they had Kane come out and pose with him. I mean they really did have a moment at WM 24 to do that. Kane had won a major title(the ECW title) earlier that night with sheer dominance, and Taker had won the title from Edge. They could have had them pose -- but they didn't, largely because they don't really care for Kane, nor his relationship to Taker as a character.
So I get that some people want the whole "brotherly" moment(I kind of did too) but it is far too late, and there is little point to it. I am sure Kane/Taker respect each other outside the ring and that is that. There is no reason for Kane to get yet another program, or a Mania match or a win over Taker. A big fat NO thank you to that, I should say.