Ok so...
- Random mentions of it aren't enough for the verse's cosmology actually having it, as there must be more solid proof of the verse using so. Gravity Falls and TTGL are that high right because of the fact that they make multiple hints to said theory actually being a thing in their cosmologies as you can see in their cosmology explanations.
- The evidence you use for the verse following branes is incomplete.
NGL that Wikipedia video is incomplete.
What you see as parallel pieces of paper are the lower-dimensional membranes that are within the higher-dimensional realm and connected through "bulks", where said membranes are infinitely thin in said realm.
I'd really suggest you to
read this for better understanding on the matter, as just basing yourself on a single Wikipedia video without bothering to check yourself how the theory works is foolish and isn't a good impression at all.
For people who didn't read what I linked, in short how a 5D brane is compared to 4D membranes is this:
As you can see, in both cases the 4D branes (which you can think of as your average
Universal+ space-time continuum) are infinitely thin pieces of paper within the 5D realm, which you can think here as
Low Complex Multiversal due to it having actual superiority over said infinitely small membranes.
In fact, Gravity Falls and Gurren Lagann have both some visual evidence of being somehow similar to this model at least:
You see the difference? These examples are textbook showings of the Bulk Cosmology, yours instead is this:
Branes do
not work like that, they're not perpendicular universes that pass through other ones perpendicularly, they're higher-dimensional universes that envelop the lower-dimensional ones within themselves as infinitely thin membranes.
Branes also aren't automatically 11D. Gurren Lagann is because the evidence makes it
extra clear that the Bulk is 11-Dimensional, hence why it's
High 1-C. Gravity Falls also follows it, but is merely
Low 1-C, possibly
1-B for now because of these extra dimensions not having really solid proofs of being superior to the lower ones, as by default they're just strings, aka 1-D lines that take higher-dimensional angles up to 11-D (or more depending on the model used).
TLDR: OP saw 2 random things online and instantly jumped to making an upgrade without bothering to look deep in why other verses qualify for it.