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Hobby Services - the bases are Warmachine style 32mm, also known (for obvious reasons) as lipped based.
Bermanj, it sounds like you've got the stripped down rulebook, rather than the full hardback (c. 300 pages, iirc)I've not gone through it in detail, but I believe Agents and Ebb etc are in the main rules (omitted from the small book due to Ops and Ebb users not being in the starter forces.In terms of additional minis, I think Batman figures scale up OK - you're looking for big 28/32's. I'll take a few comparison shots.