I know a big topic is about what happened to the Exo Toa. There may be many of these, but I'd like to state my idea of what will happen- here it goes!
The Toa shed their Exo armor while fighting the Bahrag because it hindered their elemental powers. So now they lack their elemental powers, and they need to defeat the Bohrok Kal, who can easily overcome their Kanohi's powers.
In Comic 10 (which I finally got the other day, and then started one this theory) Gali, Pohatu, and Onua (the three people I think should be making up Wahugra, but that's a different topic) are sent to infestigate the Bohrok Nests in search of the Bahrag. So, they must find their old Exo Armor, and used it to give themselves extra powers. Plus, in a picture in a Bohrok Kal instruction manual (which I just got) it shows the Exo surounding the Toa Nuva cube. Plus, in the new Lego catalog, it says that the Exo Toa may be able to defeat the Bohrok Kal, when it use to say Bahrag. So, it means the Toa must use them against the Bohrok Kal, to add to their powers. And in Comic 10, it said the return of the Exo, but it didn't say how they would return.
Also, in comic 10, Lewa made the remark "Oh great, I get the team with personality" when he learned he would be with Tahu and Kopaka, and then Kopaka silenced him. Does this mean those two will fight the whole time?
These are my two theorys. What do you think about them? I hope the aren't too complicated.