[MalcolmDwyer]

Some Unicode variants:

ᑐ ᑌ ᑎ ᑕ

ᑐ ᑌ ᑎ ᕮ

⊃ ∪ ∩ ⊂

Edit to add one more...

⋻ ⋃ ⋂ ⋳

[edaemon]

I imagine most people are aware but the second variant you have there is essentially what was used for the most recent movie: http://www.impawards.com/2021/posters/dune_ver16_xlg.jpg

[djur]

There were a lot of "DUNC" jokes about the poster, like that the main character was named "Dunc". (Real Dune heads may have some "well, actually" thoughts about that.)

[yellowapple]

I reckon Dune fans find all sorts of deeper meaning in the hit B-52s song "Private Idaho".