Gravity's going to have some very strange decks this time around. I know because jmdt shared some of his deck ideas with me before the War began because he wanted someone who could test his deck ideas on. Unfortunately my super bad, extremely selective memory prevents me from sharing some of his rather unpredictable deck ideas with everyone else.
However, there -are- a few that I do remember.
-Hope + ...Colossals? All I remember is it was something with Hope in it xD
-Liquid Shadow + Colossals.
-Catapaulting Titans with Freeze...or at least I think it was Freeze...
-Graviton Fire Eaters + Steam Machines. Had Deflags in it too iirc. Come to think of it, it's really similar to my Steam Machine deck I posted with Gravity cards in place of Aether cards. Subconsciously using other people's deck ideas FTL.
-Something with Gravity and Death. Can't remember what this was now.
-Some kind of a Life deck...looked pretty awesome. Was it Mitosis Mercs? Bah I can't remember.
However, he claimed to have had at least 50 decks made at the time so chances are he's not going to use one of the decks he showed me against us.
One thing about jmdt is that he tries to be highly unpredictable with the decks he creates. However, as awesome as his deck ideas may be, it is ultimately up to the team as a whole as to whether or not to take those decks. This puts Gravity in a difficult position. For one, they have unpredictable decks they can choose from, but on the other hand once those decks are revealed then it's going to be easy to prepare counters and it'll inflict a lot of pain on their vaults as a consequence in later rounds. Last War kevkev turned down multiple deck ideas jmdt submitted because they seemed to be risky. I don't know if GG has the nerve to do the same here, but this is a good possibility.
Also, as stupid as it sounds, being a Deck Helper apparently puts jmdt at a higher priority over the others. Since he'll be listened to more, we can expect to see his ideas more. Using something equally as unpredictable might be the only way for us to secure a win in the earlier rounds.