No longer theoretical. Jonathan Givony of DraftExpress/ESPN tweeted that Princeton's Tosan Evbuomwan did declare for the draft and will sign with an agent. ESPN has him ranked in its Best Available list as the #21 small forward and #86 player overall.
Also, the owner of the most litigious name in college basketball is going pro. Justice Sueing of Ohio State, despite playing his freshman year in 2017-2018, is somehow declaring early for the draft, according to a tweet from ESPN's Jeff Borzello. (He was at Cal for 2 seasons, sat out a transfer year, and played his 3rd and 4th seasons at Ohio State, with an injury hardship year in between.)
This guy was in the same high school graduating class as DeAndre Ayton and Trae Young.