These odds from BetOnline seem a little suspect. Oregon, Michigan and Marquette (which were all decimated by transfers and draft defections) getting better odds than Louisville and Memphis State is silly.
But, hey, get the Cards at 25/1 while you can. The number will be lower the next time this is updated.
2020 NCAA Championship - Odds to Win
Team 4/9/19 Current (5/31/19)
Kentucky 5/1 15/2
Duke 6/1 6/1
Michigan State 8/1 8/1
Virginia 13/2 8/1
Michigan 12/1 12/1
North Carolina 12/1 14/1
Gonzaga 14/1 16/1
Villanova 16/1 16/1
Kansas 20/1 22/1
Marquette 50/1 22/1
Oregon 22/1 22/1
Louisville 25/1 25/1
Memphis 66/1 25/1
Arizona 25/1 28/1
Auburn 33/1 33/1
Mississippi State 33/1 33/1
Tennessee 33/1 33/1
Texas Tech 33/1 33/1
Washington 66/1 33/1
Texas 33/1 40/1
Cincinnati 50/1 50/1
Florida 50/1 50/1
Houston 50/1 50/1
Iowa 50/1 50/1
Maryland 66/1 50/1
Ohio State 66/1 50/1
Purdue 50/1 50/1
Syracuse 50/1 50/1
Florida State 66/1 66/1
LSU 66/1 66/1
Seton Hall 66/1 66/1
Wisconsin 66/1 66/1
UCLA 100/1 100/1
USC 100/1 100/1
Arkansas Off the Board 150/1