For something that comes after something else in time or order, choose the adjective subsequent. If the entire class fails an exam, the teacher will hopefully make subsequent ones a little easier.
Subsequent comes from the Latin subsequi "to follow closely" and means just that - following or coming after. If you say, "in 1990 and subsequent years," it includes 1990, whereas "the years subsequent to 1990" do not include it. When you mention a car crash and subsequent traffic jam or a scandal and subsequent investigation, one follows the other in order but a cause and effect relationship is implied too.
adj following in time or order
accompanying, attendant, concomitant, consequent, ensuant, incidental, resultant, sequent
following or accompanying as a consequence
later, posterior, ulterior
coming at a subsequent time or stage
coming after or following