Jim Shooter, former head of Marvel and Valiant, also started a comics company called Defiant Comics back in the 90s. I liked a couple of their comics (they only made a few before going out of business), including their initial ongoing series, called "Warriors of Plasm." David Lapham drew it.
I remember hearing at the time that the book was initially going to be called just "Plasm," but that they changed it because of a lawsuit with Marvel. Shooter has discussed this lawsuit briefly since then:
We also, when we first started out, were sued by Marvel Comics. When we announced Plasm, they claimed they had a character that that infringed upon. What they actually had was a name registered in the U.K. trademark with intent to use. They ended up suing us. We ended up fighting that out in court. It cost us over $300,000 in court. We won, hands down. The judge scolded them at the them [sic], because he knew they were just using it as a business weapon. Trying to use the court to squelch a competitor.-Jim Shooter, former editor-in-chief of Defiant Comics, October 2000
A spurious trademark infringement lawsuit against us by Marvel helped speed our demise. They lost, but it cost us over $300,000 to defend ourselves. Bleeding that much money out of a small start-up is lethal. Their true mission was accomplished.
-Jim Shooter, June 2011
Here's my own comment on this situation: Jim Shooter should not blame Marvel for killing Defiant; he should blame his own lawyers. Any lawyer who allows a case to go to trial where, even if he or she wins, the litigation costs would run the client out of business is not a good lawyer, no matter how skilled he or she is at arguing in court.