challenging difficulty missions are easily as difficult as year 1 nightfalls, and have matchmaking. Incursions are likely to be divisions version of raids, and we don't know yet if it will have MM or not but so far as I know ubisofts stance is that everything has MM. Bringing up trials as dumb as heck, considering that the division isn't about arena PvP, and by the by the endgame PvP it does have, DOES have matchmaking.