Stór spoiler hér ef þetta er rétt hjá mér þannig að ekki lesa ef þið viljið ekki vita.
Restin verður á ensku vegna þess að ég hef þegar postað þessu á imdb.

As we can see in the trailer Sylar is holding Derek (the guy who he suppositly killed in mexico) up against a wall using his telekinesis ability and Derek says to him “You can't hurt me.”
Now i just read something on the page about Adam Monroe that he had been fighting a man with the ability to duplicate himself some years before, here is the text.

“At some point between 1671 and the founding of the Company, Adam Monroe became a British mercenary during the Revolutionary War - not out of loyalty to the British, but simply to ”escape boredom“, and appears to think of himself as a god. At one point, he comes across a town in which the British regiment had been single-handedly slaughtered by a man named Evan, according to a survivor. Intrigued, Adam arrived at the scene to confront the man, and killed him.

However, after killing him, an entire army of clones rushes at the regiment and caused them to retreat, leaving Adam behind. He realizes that Evan is a human replicator and pursues him across a number of years, trying to kill the original Evan. Eventually, a number of Evan clones confront and taunt Adam, saying that in numbers there is strength and he is alone and can not possibly defeat them, and pushes Adam over a cliff into a river. At this point, defeated, Adam realized the need for followers.”

My guess is that Derek is in fact this Evan that Adam was fightiting and what he was doing in a jail in mexico is something we will we get to know later on.

You can read both the text that got me to figure this out here.
http://en.wikipedia.org/wiki/Adam_Monroe
http://heroeswiki.com/Spoiler:Season_Two