I have not seen this movie, but I can already tell that they are going to do well with the multiverse thing.
From my experience with Marvel and their stories, they never seem to explore multi-dimensional possibilities. They only manage to come up with settings that resemble them.
They are quite known to have their movies overhyped and then underwhelmed. Notwithstanding, I am always down for entertainment, so I will check it out.
It's entertaining, but yes, Marvel always sets their expectations too high for people, promising a huge expansion, both in interviews and in trailers and in the end everything remains quite normal.
This will definitely contine for a long time, and it would not matter as long as they sustain the entertainment for their audience.