This from bleedingcool.com:
"It’s worth noting that both Iron Man 2 and Thor are being promoted with an “Avengers Assemble” tag. They are so going to milk the tie-ins here.
The Thor logo is chunky, and stone-like, very different from the image seen previously, reproduced above, while the Avengers logo is similar to the old version but uses a greyed out Captain America-like shield. There was no Captain America movie presence. No doubt some surreptitious shots will leak out but I wasn't taking any chances."
Below is a shot of the latest release of the Marvel Movie logo's:
This is what was released in June:
Maybe its just me, but I don't see any differences at all in both pics. Does anyone? Now I'm not complaining here because like all of you, I could watch super hero movies all day long, but if your announcing changes in the logo, maybe one should actually change the logo. Let's just hope none of these movies get's delayed for some ridiculous reason.