Dragon Ball and Marvel Comics don't have an official collaboration, but that doesn't stop fans from letting the two brands cross over.
One side is the citadel of anime, the other side is the unbreakable monument of the superhero genre. The series of photos below is the clearest proof of this. Sensa Cine is a fan of both Dragon Ball and Marvel Comics, he came up with the idea, asking for a machine learning mechanism with Dall-E or MidJourney, to create some Avengers while in the Dragon Ball universe. The people at The Ai Dreams are responsible for doing this job.
It would be hard to compare the strength of a Saiyan warrior to the Hulk, the intelligence of Iron Man or Reed Richards to Bulma, or the transformation of a character like Thor to the angry style of Broly. If it weren't for the power of artificial intelligence, it would be hard to see two famous works having a crossover at this level.
In the first four designs mentioned, they are clearly Marvel characters, but with a strong Dragon Ball world feel.
However, in the case of Thor and Captain America, the Marvel superheroes' powers are combined with one of the Dragon Ball characters' most classic transformations, Super Saiyan.
Obviously, Thor looks a lot like Broly, with thick hair and white eyes due to anger from the same transformation. In Captain America's case, it's probably a combination of Goku.