You're off to a great start with your 5DII. That said... Ianhar is right; you'll want to get a second body "just in case"... I used to shoot 25-35 weddings a year with a 28-35 2.8L (Interiors and fun wide-angles), a 28-70 2.8L (was on my camera 90% of the time), a 70-200 2.8L (shots from the back of the church when dealing with anti-camera ministers), and a 50 2.5 Macro (rings, bouquets, invitations, etc)... The 85 1.2L is a beautiful portrait lens and will be added to my collection soon... Buy a good quality strobe, I use Metz 60 CT-4's and a 45 CL-4, you can never have too much light... If you buy "L" glass, don't scrimp on your UV filters, buy top-quality glass...
Looking at what you already own my next purchase would be the 24-70 2.8L (maybe even II here shortly!)
Hope this was useful...