Well, Isaac Mendez painted the future, but if there's anything we learned in the first season, just because you think you know what you're looking at doesn't mean it means what you think.
Example- Peter died, but he had absorbed Claire's powers, so he didn't stay dead.
This new series was... non-linear. It covers many different areas of the second season, but no plotline specifically. For example, it shows Hiro fighting Takezo Kensai, but Hiro is wearing glasses, something he didn't do often in the past, including when he finally fought Kensai. Is this painting a symbol of the fight between Hiro and Adam- or was it already covered in Whitebeard's armament tent?
HRG (Horned-Rimmed Glasses... aka Noah Bennett) was shown dead- shot in the eye, with Claire hugging someone in the background. In the exchange between Claire and Elle (the electricity girl), Elle blasted Claire out of the sky, Bennett shot her, and Mohinder shot Bennett in the eye, killing him.
I had figured out that Claire's blood would be a big part of this series, because she brought it up in the first few episodes, and then Adam's blood was shown to cure people of pretty traumatic stuff- even severe radiation burns. So Claire's blood- does it have limits? Can it bring someone back from the dead?
Turns out that it can.
-kv