There's no foregone conclusion Wayne Selden is leaving Kansas. If he does go, the likelihood of getting Jackson or Ferguson go way up for the Jayhawks.
Kansas likely returns Mason, Graham, Vick, Svi Mykhailiuk, Greene, Bragg, Diallo, Coleby (Ole Miss transfer), Lucas. Azubukie and Lightfoot are already signed. The Jayhawks are also very high on Maker, Jackson, Ferguson, and Corprew. If Wayne Selden or Cheick Diallo leave early, the likelihood of getting a Maker or Jackson go up significantly.
At the end of the day, Kansas is likely to be stronger next year than they are this year. Carlton Bragg should pickup where Perry Ellis left off but there's a lot of players who have emerged at Kansas that should only be better next season. You'd be hard-pressed not seeing them #1 again, just like this season.