ICBM mod is pretty rad.
Wanting to get up to 50 or more types of missles? Damn, that's a lot. Should we brainstorm potential payloads? Off the top of my head would say maybe mob-based stuff, like one that could turn villagers into zombies, or one that rains down creepers. Maybe one that would actually restore damaged areas back into grassy plains with flowers and animals, hahaha.
I also cannot wait to see some ICBM PVP shenanigans happen.
edit: Bomb versions that can be dropped from planes, which you can ride Strangelove style.