"In normal case the don't care a [censored] about that and big companies won't bring you to court for that."
As this forum is full of aspiring game designers, the issue is not "can I get away with it?" but rather "am I doing something illegal?".
You are right; most game companies don't know or turn a blind eye to IP infringement. But that doesn't change the fact that if you use copyrighted material, you are either: a) unoriginal enough to use your own material, b) cheap enough that you don't want to pay for your own matieral, or b) lazy enough that you don't want to take the time to make up your own material.
The ONLY reason to use IP material (like capcom or HP) is because you are "borrowing" the success these material had, the recognizability of their product, and using it for your own goals. In other words, since you can't come up with good material on your own (you in the general, not specific to any forum member), you use someone else so when they see the game, they don't focus on your bad game, but the good IP.
"Big companies don't, it would draind too much of their good name if it was brought to the news. "
It's an even bigger drain on their good name if an inexperienced person makes a poor HP game, advertised it as a HP game, and then people and the news think that this is a licenced HP game. Ironically, you are correct that the better the game, the less the IP holder will complain. Free advertising right? But since "good" is in the eye of the beholder, the "little man" or the "big person" may take offense to your game and ask you to shut down at any time, even if they turned a blind eye to it for years.
Bottom line: You should not take silence to be persmission. If you don't have upfront permission to use someones IP, then it's illegal to do so.
