This, in my opinion, seems more like a teaser. Hopefully, we see a bit more action. We already know that everyone is gone. What we want to know and maybe see is how this story ends. Many speculate time travel is involved. THEY BETTER NOT DO THAT! SO HELP ME GOD!
Either way the conclusion of the Avengers will be in April. People literally was going nuts waiting for a trailer. So I can imagine what those numbers will be when this movie is played.