Honestly, my immediately reaction is that all three of these genres are basically live-service MMOs. Getting and maintaining a large enough playerbase would not be an easy feat. The different gameplay loops may make things more difficult, but extraction shooters and survival games have a lot of overlap, although I can’t picture how a 5v5 shooter would benefit from being built on top of this.

I would also warn that large-scale projects like these tend to be exponentially more difficult, without significantly increased odds of success. If this is a long-term passion project, no reason not to pursue it, but if you’re hoping to turn it into a buisness, you’re probably better off looking into something with a lower playercount required.