Marvel
This one admittedly isn’t so much of a “should” as it is a “will”. The Marvel property sells like gangbusters through the movies alone, and there’s already another Lego Marvel in development. It’d be surprising if the Marvel Universe wasn’t included in the first wave of Lego Dimensions minifigs–and make no mistake, there will be more than one wave of these things, if Lego has their say.
Still, there is a chance for Lego and Marvel to shine their light on characters that aren’t in the prime spotlight all the time. Spider-Man, Wolverine, the Avengers, we’ve seen them in Lego form about three or four times at this point. Time to show us characters like Quicksilver, Scarlet Witch, or Vision from the films. The comics have brought characters like Captain Marvel, Kamala Khan’s Ms. Marve,l and Miles Morales’ Spider-Man to the forefront. With the Inhumans getting a big screen debut in a couple of years, it’s more than likely they’ll be included at some point down the line. Heck, you have to have Pizza Dog from the Hawkeye comics. Have to.