Honestly why not just make this the Official 3DGS game jam? Six months, one unifying theme, one community driven team. Idunno, maybe a bit too ambitious but I would personally love the challenge and to be able to work with you guys. Maybe even make it the next contest? Just throwing around ideas.
, why not both? The game jam is great for new games/ideas, a pack is great for touching up semi-finished games. I mean why not, what is stopping us? Unity's CEO?