So here's what we know about the G85 kit.
Primes: I have the Lumix 14mm and see no reason for it to go anywhere. The DA Limiteds rule at 40 and 70mm, no reason for that to change. I have Pentax 100/2.8, 135/2.5 and 200/4 that can stay - perhaps. We'll see how that works out when sales begin on the Pentax kit.
Zooms: the 12-60 is the mainstay of the system and will serve 90% of my needs. Having looked into the longer range, I only see a rare need for more than the 45-150 that I currently own. The Olympus 70-300 is a nice range match for the 12-60, but its price and slow f/6.7 tele end is not friendly. That's the M.Zuiko which is specific to the micro 4:3 system.
Hmm now - here's a Zuiko Digital for way less; made for the original 4Thirds system, it weighs 600g± but is a half-stop brighter at f/4-5.6 and remains f/5 at 200mm. It also is marked as 'compatible' with CDAF systems, unlike many of the ZD dSLR-era lenses. I'll be giving this one a trial run, as it will only be used for bird and wildlife shots where 600g will not be punishing. I wish it had a tripod ring, hopefully I can cobble up something..
More nice features about the monster tele: 1:2 macro focus and 58mm filters just like the 12-60!
Note: after tests on several µ43 bodies I must conclude the takes of CDAF compatibility are .. well, WRONG. Manual focus is fine and focal-length data is transmitted to the IS system. No autofocus without phase detection though.