Floyd Mayweather v Manny Pacquiao - WBO/WBA/WBC Welterweight Vasyl Lomachenko v Nicholas Walters - WBO/WBA Featherweight Erislandy Lara v Cornelius Bundrage - WBA/IBF Welterweight titles Jessie Vargas v Jose Benavidez - WBA Light Welterweight Amir Khan v Marcos Maidana
They should get Maidana vs Algieri on the undercard, that would build up the anticipation to the main event.
I've posted this before, but the u/c will probably be lackluster. With so much guaranteed to the main event fighters they won't shell out big bucks for the co-main. Likely we will see Lomachenko and a TMT fighter. A fight like Jack/Dirrell might be the best we can hope for. Sort of funny, since you mentioned Bundrage, I looked up the u/c for the last joint PPV between Lewis/Tyson. Bundrage and Pacquiao were both on it, although Pac/Julio was the only one televised IIRC.
Realistically could get some good lower weight fights as they fight for peanuts. Loma walters for sure and any weights below that should make for good stuff. Assuming wilder will still be injured by then, his first defense against a fringe guy wouldn't be awful
Santa Cruz could get on the card against quigg, frampton, mares, or rigo.....or tba which os what the fans really want