A better question might also be what kind of magic items will you give out as your rewards. By the end of 3.5 (and in Pathfinder even now), some of the mechanics conditioned players to not only expect magic items, but also to expect items that exactly fit their desires. With the reduced focus in 5e on magic items, will you be giving players items that fit their concept, or items that are more random or only partial fits? For example, if you have a great weapon focused fighter in your group and you roll up (or the module states) a +2 one-handed sword, are you likely to change it to another weapon that fits the fighter's feats?
Personally, I like the idea that you might have to make do with a less-than-ideal item because of its magic value. Considering that players won't have much of a chance of buying magic (in the base rules), this might mean they never get exactly what they want. But that could be a good hook. One of my best ever adventures as a player was a hunt for a Githyanki to get that vorpal sword that I coveted (and the consequences of that hunt)...