I don't do that typically because the bigger the cast the more tempting it is to buy a bunch from one film. I'd rather spread out buying the figures over time personally. To me it doesn't really matter if all my figures are from the same film.
Ensemble movies are brutal financially but Im OCD about displaying figures from the same movie together only and solo movie figs are always out of place. I just grab the figures that are most likely to sell out first and buy the other characters as I find deals on them(like the $155 shipped WS Nick Fury I just bought from a website I forgot the name of).