Just listened to Coast 2 Coast 153 and Andrew Heighway had some interesting things to say about their upcoming titles 3+4. This is just me guessing but here's what was stated in the interview:

-Titles 3+4 are licenses
-They are wary of doing too many of the same thing, for example "too many cartoon themes".
-Something about a cartoon with adult language.
-Theme that has been done before as a pinball machine and has the staying power to be revisited.

To me, at least, I really got the South Park vibe from the comments. I'll re-listen and see if I can get some more relevant quotes.

Relevant bits start around 13 minutes in, thoughts?

http://www.podcastgarden.com/episode/episode-153-an-evening-with-andrew-heighway_44154

Man, Andrew talks *really* fast. Here are a couple I pulled, but it took a lot of rewinding and such.

“we’re really going after the coin-op market”
“not a game targeting collectors”
“second two licenses are very strong”
“three games released a year”
“games that’ve been in the past”
“maybe that game got made but really wasn’t as good as it could have been, maybe if we took it on and maybe it’s been a long period of time since that last game, maybe we could, maybe we could do something really good with that.”
“we’ve gone after licenses that we think are going to interest as big a demographic as possible”
“it’s all very well having a family pin, but sometimes you just want to have some beers with your friends and enjoy a bit of pinball that’s got some profanity in it, it’s entertainment.”

On consideration, I'd like to see Archer done.

Not an older theme that's been done before so out of the running for this guess-fest though.