It's true that the introduction of new powerful threats may persuade users to be in favor of unbanning borderline suspects such as Excadrill and Blaziken. However it is most likely that despite these changes, a significant proportion of the community will remain vocal in their opinion that it's uber status should be maintained. Given the amount of drama and hostility we've experienced on our past borderline OU/Ubers suspect discussions, I would say that i'd be better for the sake of the community to leave them banned for the time being.
Rather then spending time and energy on Ubers who will most likely remain borderline cases for the entirety of the fifth generation. It would seem more interesting to broaden our experience and knowledge on Ubers who have yet to see their first battles in the OU metagame. Based on this reasoning i would agree with the jc104's proposal to test Kyurem-B's performance in the OU metagame after the Garchomp testing has finished. If it turns out to be just another borderline case without general consensus from the community leave it banned like it is now.
Still i am a bit surprised however that many would consider Kyurem-B as the (possible) least effective pokemon never given a chance in OU. Based on pure theorymon i'd say the prime suspect fitting this description would be Ho-Oh. More then any other Uber pokemon it suffers from the omnipresence of both Stealth Rock and Drizzle, as such that Regenerator only serves to cushion the horrible side-effects of it's typing rather then being a great asset. It's 130-base Attack would be considered average as a physical sweeper in this metagame and 90 Speed even leans towards remarkably slow(again for a sweeper). It has considerable defenses and access to reliable recovery however so does Kyurem-B likewise despite it's massive SpD stat most special sweepers in the current metagame have no problem dealing with Ho-Oh even without the aid of SR. There are better pokemon that can abuse Flying stab(read Tornadus-T) and Sacred Fire's side effect is no longer as impressive as it once was. Pokemon such as Victini and Darmatian hit much harder as sun/non-weather sweepers and many would prefer to KO right away with V-create or Sheer force boosted Flare blitz rather then having a coinflip chance to burn.
Last edited by mien; Sep 11th, 2012 at 2:48:49 PM.