Ideas for Roleplays?

Okay so I have a few ideas for some roleplays. They'll just be quick summaries that aren't fully fleshed out because I just want to see what people would like in a rp. Some of the ideas are okay, some... maybe for another time but anyway here they are:

Zombie Apocalypse - Quick and easy. Simple prologue, the dead are coming back to life and people are dying. Not much to say here, weapons are obviously allowed along with your character's powers (if they have any) but I'm thinking we should have special zombies that have their own abilities and weaknesses. I'm not sure whether to focus more on the action side of zombies, the drama and relationships side or just try to find a balance. I think zombie apocalypse is good for showing off what our characters can do in tough and extreme situations with their intellect, skills and wits.

Final Destination/Another - Now both of these concepts are based on an otherworldly force hunts a group of people and kills them in increasingly gruesome and unrealistic ways. Now in Final Destiantion, the group chosen are one premonitionist (someone who can see the future) and a group of people who end up cheating Death (that's what the force is called). In Another, it's a class of students and family gets killed off because something, death, bring class closer to death, extra people and other things that I would say but would have to spoil the anime (yes I'm that kind of person). Now the thing to get around is characters dying, I know no-one likes their character to die and we can obviously avert deaths in the rp but the whole point is, "people dying, need to stop it somehow." We can either make sure no-one dies at all or just make sure people bring multiple characters into the rp so if one of them die, they won't immediately be out of the rp. Of course we could adjust this basic plot so it's not people dying but I'm not sure where to go from here.

Castaway - This is a plot of a plane crashes and everyone on it gets deserted in the middle of the ocean. They find a nearby island and find that only a small group survived the entire crash. The survivors need to learn to survive by catching food and building shelter among other things. Eventually, they need to leave the island before the island sinks underwater, giving them a time limit. The island is quite big, taking about a whole day or two to get around the whole thing.

Please tell me if any of these ideas are good and how I can improve them or if you have any ideas of your own, please put them forward. Also should these ideas turn into closed or open roleplays?

Tbh, if people are dying, it would probably be a good idea for it to be in non-canon, because I'm pretty sure this place operates on a perma-death basis, unless something in the plot can bring a character back to life.

Yeah good point. We can just say it's a non Canon rp so that makes character deaths meaningless to the Canon