This is an insert for the Marvel United board game and expansions. It fits in two of the larger boxes (it doesn't fit in the smaller expansion boxes - I use the original Marvel United box and the X-Men base game box). Using this insert I've been able to condense the following with sleeved cards and a little room to spare:

• Marvel United Base Game
• Marvel United: X-Men
• Enter the Spider-Verse
• Guardians of the Galaxy Remix
• X-Men - Blue Team
• Tales of Asgard
• Rise of the Black Panther
• Doctor Strange

I imagine it would work equally well with other combinations of expansions. Note that I use the segmented card trays for the villains, one per segment, and put the heroes all together in the unsegmented card trays - mix and match as desired. The location tray is also split to accommodate smaller printers (I have an A1 Mini).