Well see, trailers wouldn't be put our shelves in
our neck of the woods - me and my kids
play with our transformers almost like a role-playing game. So that trailer moves from "nice to have" to "essential." Hiding Autobots in there, hauling a downed comrade or enemy... you can't do these things without a trailer unless you fly back to base in robot mode with the stricken Transformer in your arms - and since humans aren't too keen on a second Transformer war happening on Earth, they're kind of openly hostile.
Transforming, in our game, isn't so much a disguise from each other, as much as humans. They're fine in small numbers, and then you remember: "It's their planet, there's like 6 billion of them, and they've had since 1984 to steal what they can of our technology and use it against us."
Yeah. Trailer would help. Battle station not required, just the trailer, which would hold something called
cargo space (humor intended, not being flippant).
My pic of Skyfire / Jetfire
Jetfire/Skyfire coming from outer space (the only Transformer I ever owned as a kid who had his own private warp drive, no need for a space ship; still the case today), that was
big news. Little things count for your Autobots and Decepticons when there are only 3-5 main guys and 8 mini KO's of combiners per side
TRAMP:Version 1 of your trailer looks better. Please keep us posted. I'm going to hit Toys Aren't Us to see if I can find a toy with a trailer that's about the right height.