Originally Posted by
CentralPower
It is not a question of if Marvel owns Circuit Breaker. (They do. Unambiguously.)
The question is why Marvel would bother to use an obscure character that is inextricably tied to a viable, non-Marvel, franchise.
All of Circuit Breaker's major appearances were in the original US/UK "Transformers" run.
US-1, Shogun Warriors and Team America are all tied to moribund properties that most people do not remember or care about. If "Transformers" was where it was 25 years ago (specifically, the depths of obscurity), then Marvel might use Circuit Breaker. But, TF is a viable property that is held by another company.
Nobody gives a damn about that one page. Yes, it establishes that Marvel owns Circuit Breaker. But, nobody gives a damn about Circuit Breaker. There are people who care about Transformers who don't give a damn about Circuit Breaker. Marvel has zero reason to use an obscure character that is tied to a franchise they do not own.