THOR
I think the best way to relaunch Thor would be to place emphasis on him as a god, his interactions with the other gods and the other realms of the world. Sure you can have him on Earth doing heroic things and interacting with the other heroes but in that isn’t his real home, his heart will always be in Asgard. Maybe alternate all the arcs between time spent on Earth and time spent amongst the gods. Plus, expect to see Loki looking a lot more like Tom Hiddleston with much less green than usual.
Likelihood of happening: Absolutely. CBR confirmed this one as well.