Trailers look promising, but with all the multiverse stuff going on I'm worried this is just going to become a mess and be more about focusing on cameo apperances and fan service than telling a compelling story.
If they do it correctly, it could work. I hope it's smart writing and not just fan service like Spider Man. I saw Everything Everywhere All at Once, they did a fantastic job with a multiverse story. 2 hours seems like a short movie for this kind of story and they have done a lot of re-writes, so I am a bit worried.