Is that all the promo is referring to, though? Networks don’t usually run mysterious promos for a new logo alone, unless something else is happening in conjunction with it—i.e. a blockbuster acquisition, a significant format overhaul, a new viewer participation opportunity, or the like.
That’s not to cast doubt on the new logo, though. Obviously they have it in place already, and the forthcoming Birthday Bash would be an ideal time to roll it out. But I’m thinking there may be something more going on besides just that. And granted, I haven’t yet managed to catch the promo in question, so I may be totally off-base.