Exploring Google Earth, it appears the Pixar Studios area at DHS is a pretty good match indeed for the size of this wall. So a bit of piecing together (and topic hijacking, sorry):

It's strange how much of a focal point those toilets are with the huge sign, don't you think? I guess that's how much of a void the original park was. Maybe they could take the opportunity to remodel that, move the entrance around, and open up space for a small store opening out onto Hollywood Boulevard?

This particular side of Pixar Place also includes both a food and merchandise kiosk, themed with oversized toys, so the whole area would be a bridge into Toy Story Playland, which as planned will (in my opinion...) be far too self-contained.
Obviously all more expensive than a simple berm, but the design work is pretty much done. For some reason, I really feel WDS lacks bricks or even faux-bricks. It's such a land of fake concrete shells, this kind of themeing gives so much more substance and character.

(Paris version wouldn't have enough space to be quite this wide)
I love the bridge across the walkway at Pixar Place too. It's completely pointless but absolutely essential (same as level changes). It really encloses the area and would obviously work perfectly here as a proper second Toon Studio entrance.
This area of DHS/MGM used to look like a boring back alley too. Pixar Place transformed it.