JP Wonderfest display 2019

The display of the Seacons has already been posted up here, but here are a gallery of photos of other parts of the Transformers display, including Unicron, a black redeco of the Japanese exclusive Legendary Optimus (the upsized Voyager Optimus toy from TF4), MP Lioconvoy, a number of dioramas, and names and Japanese product numbers for some Siege toys that were first revealed at SDCC.
They also have the reissue Big Convoy on display with a super cannon from the cartoon, but nothing noting if it is going to be a reissue of the reissue with that new accessory, or if the accessory is going to be sold or given away at some point (or if it is just a custom item added to the display).
Extra photos of the Seacons show that the gun modes are held by their connector port, which means all five can be a gun without having to add another post for the fist to hold on to.

More photos compiled here from various sources.