@Cecil:
I had a theory a while back that Luffy would finish DD by smashing him through the factory. Now It actually looks like it could happen again.
I think that we are thinking now that Factory itself will have to get destroyed from outside.
RamistaR had very nice prediction-wild guess on Trebols sceptre being a key to Smile factory.
Also as Law had 0 information about Smile Factory when they all gotten onto Dressrosa I can expect even 2 devil fruit fighters going to factory to take care of Trebol and Diamante. I would not be suprised if Law will not be one of them.
Why I think RamistaR might be right in that Trebols sceptre- being possibly the key thing? For few reasons. Luffy lately shown how hard is to open something made out of seastone while you are DF user and cant touch it at all. So as it seems most probably all of Mingos crew are fruit users and it would be very hard to open factory with small key- Trebols sceptre is big and long so he would be able to open some big doors from safe distance.
Beside Trebol seems to be most trusted of Doflamingo subordinates- he was bodyguard of Sugar that was key to Doflamingo easily holding Dressrosa, he was protecting Mera Mera no mi for Doflamingo and I would not be suprised at all if he is the one to take care of Smile Factory as well by at least holding the key in his hand all the time. It would testament him as most trusted guy in Mingos crew after Vergo being absent. Trebol is shown to be always in center, in front when 3 seats are present
!
!
I am not joining hype train for Pica as what he was shown till now was being useful in castle made out of rock. He didnt protected anything for Mingo and I expect him to not be such a powerhouse outside of situation where he is surrounded by rocks. On his own turf with all rock material he wanted being around him he did not even put a smalles scratch on Zoro. If not for Sanji being cocky and blantly blocking Vergos kick back on PH we would not have much on Mingo top being real danger to Monster Trio.
I know that he had that sceptre thing even 10 years ago but it would be nice detail if now it would be also a key to the factory.