The Washington Wizards will only have John Wall, Otto Porter, Marcin Gortat, Kelly Oubre and Markieff Morris under contract while entering the free agency period. Virtually everyone else is going to become a free agent in some capacity, including Bradley Beal.
Given how bad the team was this season, you can kind of assume that the roster is going to look completely different next year.
The starting five will likely return – Beal is a restricted free agent and the team can (and likely will) match any offer – but the team is going to have holes that will be filled by free agents.