My purchase depends not only on how much content there is at day 1 -- but if it feels (reasonably) complete. If the game has a narrative focus (like Absolution), then cutting that off 2/3rds of the way in is just going to be crazy unsatisfying -- however if the game is mostly just separate contracts completely independent of one-another with narratives tied to the level and target then I can see myself getting on board, that is if the game is good to begin with.