i think we can expect to see joe and cobra vehicles that "we actually recognize"! I also think they are making a conscious effort to go with the "B" team for both joe and cobra. We are getting Flint and Lady Jaye and Roadblock and Jinx with of course Duke and Snake Eyes thrown in. Somehow i do NOT think Duke is going to play a prominent role.
On Cobra it looks like the B squad as well with Zartan and Firefly Calling the shots, and probably a lot of Storm Shadow as well. Although there is still a ton of uncertainty surrounding Cobra Commander, i would bank he is in it at some point, but it wouldnt shock me if we do not see the Baroness or Destro at all, in an attempt to get entirely away from what was done in ROC.
I could be wrong but i think a lot of this banter about dancers and a pop singer having roles, don't be shocked if this is some sort of night club scene or something along those lines, kind of like "The Snake Club" in the cartoon.
As you can tell i am cautiously holding onto optimism for this movie