Oh yeah. No to both these ideas. The MCU has a lot more compelling people to bring to the forefront than an even more meaningless Zemo and a Nick Fury no one will care about 10-20 years from now. Yeah I said it! Zemo is meaningless. Wanna know why? Because he's gonna die at the end of Cap 3 anyway. ALL of Cap's big bad villians die at the end of his movies. Because Cap or anybody related to the Cap branch of the MCU doesn't fight villains, he fights villainous idealogies. Hydra is Cap's villain. Everyone else, from the Red Skull to the Winter Soldier, is just the personification of that idealogy. Not important in the grand scheme of things. As for Nick Fury: I'll only except it if Nick Fury is not a name but a specific codename/title like James Bond. I personally found the who Nick Fury love child thing from the comics to be too soap opera-ish. I mean really, Nick Fury had a love child with a black woman and now that child is going to take his spot. Oh and he just so happens to have an eyepatch. Come on!