Hmm... Trek movies haven't tended to have A-list movie stars in them that often, have they? Ricardo Montalban and Christopher Lloyd were known mainly as TV stars. Christopher Plummer was probably the biggest name actor in the TOS movies. Malcolm McDowell and Whoopi Goldberg were probably the biggest names in the TNG movies at the time (though Tom Hardy's become a much bigger name since). The new movies, being on more of a tentpole level, tend to have bigger names -- Cumberbatch and Elba are pretty much A-list stars, and Pine, Saldana, and Pegg are pretty prominent themselves.