I have played Shadowbane on and off since beta, but in all my years I was never able to participate in any of the epic banes that made history simply because my hardware (although never underpowered at the time) never seemed to play nice with the Arcane Engine. Between the 3 spf and constant sb.exe crashes, I basically resigned myself to small scale pvp, and I feel like I really missed out on some amazing memories. In fact, I would go as far as to say that Shadowbane would still be around today (not in emulated form) had it used a better engine. So I will implore to the devs this time around - If you are trying to design another game with massive battles, please invest a disproportionate amount of time and effort into optimization of the engine and netcode.
In my opinion, the best engine right now for this sort of thing is Forgelight. Love it or hate it, you cannot deny that Planetside 2 runs incredibly smooth for the amount of stuff going on in one area. I am curious as to whether the devs plan on using a homemade engine or are going to license one.