So I believe the thing Blackbeard will try to get before the Marine's is Pluton.
I believe what Cobra was going to ask to the five elders was something related to the poneglyphs in Alabasta and the Gorosei came to the conclusion that Pluton could be indeed in Alabasta and probably decided to take it for themselves, Cobra realising he made a mistake tried to prevent it and the Gorosei took princess Vivi as a hostage.
In jaimini's translation Blackbeard says that 'Instead of letting it land in the hand of the Marines.... I'd much rather take it for myself!' which makes me believe it is an object/weapon and also this would be the perfect scapegoat to 'Extinguish the light' (Vivi-sama) as Im probably order them to.
So this is all my speculation so let me know what do you guys think of!
I believe what Cobra was going to ask to the five elders was something related to the poneglyphs in Alabasta and the Gorosei came to the conclusion that Pluton could be indeed in Alabasta and probably decided to take it for themselves, Cobra realising he made a mistake tried to prevent it and the Gorosei took princess Vivi as a hostage.
In jaimini's translation Blackbeard says that 'Instead of letting it land in the hand of the Marines.... I'd much rather take it for myself!' which makes me believe it is an object/weapon and also this would be the perfect scapegoat to 'Extinguish the light' (Vivi-sama) as Im probably order them to.
So this is all my speculation so let me know what do you guys think of!