I'd put money down for The Simpsons Pinball Party Vault Edition right now. There is also major chatter on Pinside that a Lord of the Rings VE is being worked on right now. As always, no confirmation until Stern actually announce it. I'd be interested to grab one of those to experience what most pinheads consider Stern's best game.

I'd think the new SPIKE system would emulate both Whitestar and SAM. We'll see what the future holds.

Cheers!
Adam.