Technically that's what SR does too. Give you the first half while they work on Berlin.
Hints are dropped about shit going down in Berlin near the end of the game, and you do meet Brackhaus/Lofwyr near the end, and get hints of him perhaps requiring assistance.
Whether you can import your character straight over is up for grabs. The editor seems to allow it, though it doesn't take your nuyen or your stash. On the flipside, my character was already a practically immortal god by the end of the game, so eh. Unless Berlin is way harder, it'd be boring to play more with him.
Plus RP'ing wise he's kind of had enough. I had him take the job as new security consultant for Telestrian.