There are 3 silver statues in the area. Shoot them with Silver Lego Blowup (e.g. Ironman)
Up to the left there is a Fuse Box. Use Fuse Box Access (e.g. Ms Marvel)
In the story, you use Rune Tracing to get to the canon control panel. There is an assembly line. The Minikit is on it.
At the bottom left, there is a pipe that goes up - the baddies are coming out of it - Fly up (e.g. Ironman). The Minikit is on its ceiling.
Character in Peril (Stan Lee)
He's stuck inside the downstairs room with a power grid (red squares) window. To get in, pick someone small (e.g. Groot) and jump through the flickering power square at the bottom left. Once inside, destroy everything and build a Ms. Marvel Spot. Use it. Then Stan Lee can get out.
To the right there is an Electricity Panel. Use it (e.g. Thor) and hop onto the platforms until you reach the top. There, use Telekinesis (e.g. Doctor Strange) to get the Minikit out.
Continue to the boss fight. At the front right destroy everything to reveal a Rune Tracing Pad. Use it (e.g. Doctor Strange)
There is a Minikit hidden behind the stairs under the round platform in the center of the area.
Open the door to the left with Telekinesis (e.g. Doctor Strange) and go inside.
When Kang opens the green portal above, you would open it more to continue with the story. Instead, turn Time the other way so the portal closes. The Minikit can be picket up at the bottom of the stairs.
Continue to the next part of the story. At the bottom right, close to the stairs, you can use Double Rope Pull (e.g. Ms. Marvel) to get the Minikit trapped inside.
Token: The Grandmaster (Thor: Ragnarok)
At the top left, blast the door with Sonar (e.g. Black Bolt) and go inside to pick it up.