The 150mm f/2.8 will be tempting for hiking/travelling/weight conscious wildlife photographers, especially if Panasonic also make a sharp 2x teleconverter (preferably with integrated tripod mount). Alas, still not DSLR competitive for sports til Olympus or Panasonic does on sensor phase detection focusing.
The 42.5 f/1.2 would have been interesting to me before I discovered how nicely the 75 f/1.8 simplifies portrait backgrounds, if you have enough space.
@ Sharpshooter1: 4/3 lenses will auto focus, but more slowly, even those that are contrast detect AF enabled (9-18, 14-50, 14-54 II, 14-150, 25 F2.8, 14-42*, 40-150*, 70-300*, 25 F1.4*) (*=only w/ latest lens firmware). You can look at www.youtube.com/watch?v=ICfJNokJhMo for a few autofocus demonstrations with 4/3 lenses.