I'm not sure. Maybe you need to check the latest issues or the author's intentions to know if Luigi is dead for real in the comic.
It depends on the specific comic. Sometimes Luigi might face peril but not necessarily die.
Hard to say for sure. It depends on how the comic creator envisioned their relationship. It could be a unique take on the characters' dynamics.
I don't think so. They are usually depicted as rivals or enemies in most Mario-related comics.
Yes, in some comic storylines, Superman has died, but often there are plot twists and he comes back.
I don't think so. Comics have always had a way of evolving and surviving. Just because there might be a lull doesn't mean the comic god is dead.
Well, in most cases, Sonic isn't dead. Comics often have cliffhangers and fake-outs to keep the story exciting. Maybe it's just a part of a complex storyline that will have a resolution later.
Yes, Thanos is dead in the comic. His fate was sealed in a major storyline.
Comic Vine might be dead. There are no new posts or developments, and it has lost its former popularity. It's possible that it has come to an end.
Yes, Batman might be dead in some comic storylines. But sometimes, death in comics isn't always permanent.
Yes, in some comic storylines, Spiderman has been shown to die.