In case you forgot, Sylar was not affected by freezing time.
He was - Time resumed before Sylar grabbed the sword. Notice that his mother had been frozen in place as she fell. Time resumed as hiro swung the sword and she continued to fall to the floor.
IIRC (I'll have to go back and watch to double-check), I seem to recall that there was a painting showing the cheerleader on the steps with "Sylar" looking down on her, but when it came to that point in time, it was Peter in that actual position. I swear I remember pointing this out to my wife.
There were 2 separate paintings. 1 of peter lying dead or dying in front of the clock - this was the initially missing panel. the other was a cheerleader [thought to be claire] lying dead with sylar standing over her - it was the painting that peter finished via tapping into isaac's ability.
Is this what you meant or something else?
The future can be changed. Even Isaac told Sylar they will stop him. I doubt he was referring to the "future" that Hiro just came back from. Otherwise, why not just let things run their course?
Yes but i think Isaac's plan did involve Hiro traveling to the future [that future] and back again, for some reason. He told sylar he was going to 'show them how to kill you' - Given that he wasn't going to survive the encounter he had to have already planned something out - ie: the comic book pages or the sketchbook.
Also, we could say that the events in texas circa 'homecoming' played out as isaac had foreseen - even tho that's not how the visions / paintings were interpreted.
Peter died - they didn't know Claire would / could resurrect him
The dead cheerleader is jackie - not claire. We cant know if at any point this was to be claire.
Hiro and Ando were there - just not at the same time.
Let's all go re-watch and reconvene.