You're a little late to the debate, trailer's been out for two or so weeks. But from what little we know of from this COD, I (and everyone else, hater or fan) can't judge yay or nay and here's why:
1. Its the first COD to have a three year development cycle in the franchise unlike the regular two. More time may or may not mean newer content.
2. Many people have said it is running on a new engine, personally can't verify it (kinda doubt it), but if true, the argument that COD is falling behind technologically can be put to rest.
3. This is begin made by a separate company, SledgeHammer games, makers of Dante's Inferno and Dead Space, we don't know what their writers are capable of for the SP, and we don't know what their programmers are capable of for MP for this game at least.
4. This really looks like an innovative idea, I won't deny that. And to those who say it rips off Titanfall (as I have seen on YouTube) Titanfall was announced at E3 in 2011, this COD was beginning development before E3 and once a project in video games is started, you can't just change and expect it on time.
5. The one thing I don't doubt is that the soundtrack will be great, always has been.