AA
With this line, villain could have KK+ but he would not min 5 bet with KK. So AA is the only possibility left.
Since BB is rock it is most likely he plays like this with AA/KK and since there are more KK combos left I vote for KK
THE HAND IS KK PROBABLY, BECAUSE IS TOO MUCH THA RE-RAISE WICH DO. I THINK IS NOT BLUFF, IS TOO MUCH BIIG RAISE..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
I would say he has the other 2 aces. If he is "weak" tight as described, he won't be fooling around with hands like AK or AQ like that. With KK he would probably just call hoping that the hero doesn't have AA. Most weak tight players tend to play a bit scared and would not call with hands like QQ, JJ or lower. They would just assume that after a 4 bet their hand is no good.
i like to think its KK.
1) because as KK stand strong, You never want to see a flop with KK, because afraid of random A-2-9 flops.
2) he was solid and might even have AA, but there are much more combinations left with KK
KK
He is tight player and after min 4beting calls 5bet shove, he has premium hand and since hero has AA that leaves KK as most probable hand
BB was happy to go all in out of position, he's confident he has the best hand so it's one of four AA unlikely as you have the other AA, KK is popular but weak if hero isn't bluffing, the others would be AKs or AKo as a lot of players like forcing the all in with these, if you put a gun to my head I'd go for AKo
Para mi tiene KK ya que con AK se queda al call o se estackea esa 5 es KK esperando un call de pareja inferior o AK y estaquearse en casi todos los flops.