I just started watching this show and man it is friggin awesome.
I love Hiro, his character really is quite funny. Future Hiro looked pretty badass too. I wasn't thinking of the Trunks reference, but the katana would make sense. The first thing I actually thought of was a Days of Future Past reference. It would make sense seeing how Hiro referenced that in the first episode.
I'm also intrigued as to what the deal is with Peter. I like the idea of borrowing powers, but it just doesn't make sense to me that he would have his dreams of flying at the beginning of the first episode unless it was just supposed to be a coincidence. I was also wondering, when did Peter use Issac's powers? I must have missed that.