Samsung doesn't seem too worried about Apple's Nortel patents.
In their press release they said: "We are confident that we can demonstrate the distinctiveness of Samsung's mobile devices when the case goes to trial next year."
Samsung is expecting to go to war with whatever Apple threw at them now and with whatever Apple has in their quiver (i.e. the Nortel lot).
Samsung knows about Apple's newly acquired patents, everyone knows about them, and Samsung still is not scared. Legal strategies have likely already been formulated even considering the Nortel patents and Samsung is still confidently preparing for trial as they have publicly stated above.
Now Apple needs to go at them with something they currently don't have, which Samsung acknowledges, and has exposure against and more so starting in 2012.