Unfortunately with the news of star wars becoming PVP, does anyone think that FFG wil ever do another co-op LCG? IMHO, Star Wars would have been perfect, but obviously for their own reasons FFG couldn't make a solid version, so with that being said, what theme would everyone be excited to see come down the pipe? I personally would like to see a space theme or maybe even a Blood Bowl fantasy theme perhaps.
Im just unhappy about the fact that they ditched the co-op version (and rightfully so if it was crap, props to them not releasing a crap game). Like many I was looking forward to it.
A co-op probably needs to have a dominant force of evil that the players have to overcome, so, yes, the Star Wars theme would work very well. That being said, I'm not convinced that LCGs and co-ops are a good mix. The main selling point of an LCG is the changing options for card building that come out each month. In PvP LCGs any power creep is no big deal since both players have access to the powerful cards. And if you choose to skip a chapter pack or two it might not hurt your deck very much.
With a co-op, however, only one player is creating a more powerful deck with the new cards in each month's chapter pack. The players get stronger and stronger because they have more and more options for fine-tuning their deck and creating powerful combos. This means that the designers have to make the quests harder and harder. But if the quests keep getting harder then it becomes impossible for new players to pick and choose a few random quests to try. You almost have to buy all the chapter packs or else you end up playing against a quest that was made to be a challenge against fully realized decks.
I like the LotR game system and think making it co-op was a good idea if only for the novelty. Still, I don't think I will continue to buy expansions for it. Already I feel like the challenge is beginning to wane. Sure the first time I play a quest I might get destroyed, but once I see a few of the card interactions it's not that difficult to make a deck that specifically deals with that quest. Now there are ways to make the game more challenging such as picking random quests or doing multiple quests in a row with the same deck, nevertheless the metagame aspect of deckbuilding is severely limited in a co-op.
But to get back to the original question, I suppose some sort of super hero universe would make for a good co-op LCG if they felt the need to do it again. Or zombies or some post-apocalyptic world. Maybe even Greek mythology. Or they could stick with the Android universe and make a co-op version of Netrunner.