Machinima gameplay video (syndrome gameplay)

Found this video from mahcinima, it mostly mash up,of interview and trailer parts. But there is some offscreen footage of syndrome gameplay and figure in the middle of the video

At 3:47, there's some sort of gate in the background which is interesting. It looks like it has shots of all the family plus Syndrome, so I wonder if you need them all to access it... Fingers crossed it's just a one-off thing in that possibility or it'll be a problem for lots of people! (Myself not included)

[Sheriff Woody]

it looks like a type of safe or vault entrance requiring all characters to allow it to open ...

i'm cool with needing all the characters to open it, as long as it's once a playset and not a recurring thing. a special bonus for using all the characters a pretty cool (especially if you can just get together with friends who have different figures and open them )

I will have all the Incredibles characters, so I am looking forward to seeing what is behind this vault! I expect there will be one for every playset...

I'm not so sure. They have said that there will be areas or items that you can only get with certain figures within a Playset.
Is this something you unlock locally with each figure in sequence, with friends (but there is more than four and I thought online multiplayer was just for the Toy Box and not Playsets) or it could be something you unlock with a character/figure once you finish the game game with that character.
I wonder which or what else?