The eight sides will complete the draft behind closed doors on Monday, with the selections revealed to the public on Tuesday.
There's seven players remaining with reserve prices set at the maximum £125,000, including Australian batter David Warner and West Indies star Chris Gayle.
In total, 585 players are now registered for the draft, with the eight sides able to choose from 285 foreign contenders and 250 domestic options.
There are 42 places still yet to be filled, including 11 vacant spots for stars valued in the £125,000 bracket.
Among the players looking to secure a deal to participate in the 100-ball tournament, 21 England internationals are in the draft, including recent Test debutants Matthew Fisher and Alex Lees.
But of the hundreds of players available, Warner and Gayle are expected to be swept up early on, and London Spirit are the side boasting the first pick of the draft, after they finished bottom of the standings in last year's inaugral competition.
Spirit were coached by Shane Warne, who sadly passed last month. His state funeral was held last week, with the organisers of The Hundred opting to push back the draft until April 5 to avoid clashing with the event.
Each team were permitted to keep 10 players from last season's roster, and will complete their team on Tuesday bar two picks allowed in June, including their overseas wildcard pick.
Last season's champions, Southern Brave - who have retained the services of pace bowler Jofra Archer - will launch the tournament on August 3, hosting a Welsh Fire team which already includes England duo Jonny Bairstow and Ollie Pope.