I love this show, but get so confused at points. I guess that is part of the fun in it. Here are some of my thoughts.
Spoiler Alert!I think that Matt's dad controls peoples thoughts. Remember he said something like, "It starts with reading peoples minds, then it turns into something completely different." Then he said he would show him something.
I love Hiro's story. I think something is going to happen to Hiro in the past where he is going to realize another level of his powers. Maybe he will be involved in the fight with the dragon, and he will see himself. I think he is going to realize that he can bend time, and be in two places/times at once.
There is a ton of other stuff that I have thought about, but maybe I will type that in later. idk.