As a bounty hunter do you think Lockdown will have any trophies of other alien life like Arachnid from Prime, that maybe might hint to future characters in 5 and 6?
I'm betting yes. Bay did say the Nightship holds tons of secrets and potential for expanding the universe. Plus, look at Wolf; there's no way he's a Cybertronian.
Micheal Bay said that there are secrets or something like that in Nightship and in the Payoff trailer you see guns on the background when Cade is shooting his alien gun examples of trophies that Lockdown has and there are some things in his ship that leads us to the big villian.
Definitely expecting to see trophies, maybe even a limb from an Autobot that has appeared in the past trilogy.
Airachnid kept trophies, too. Apparently, they were of little children. (Predatory - Transformers Wiki) I wonder if Bay would try something like that...
Maybe Lockdown also wants to collect the head of the Decepticon leader as one of his prized trophies. He could display it with the head of the leader of the Autobots too.