The Avengers are basically what the X-Men were in the 90's. I mean, they made billions of dollars with their movies. The brand is Disney gold and I doubt they would just let it disappear because they're going to have the Thunderbolts, Blade and the X-Men. They're creating an empire and aren't going to throw away their money makers.
Wakanda was a cultural movement and Infinity War was the biggest epic in movie history.
Also, I'm 100% were going to get all the X-Men movies and shows announced at D23.
All the gaps will be X-Men, Deadpool, Shang-Chi 2, and maybe Eternals 2. I don't know who else they could do otherwise.