The line-up will include some of Lesnar's UFC fights and his 2000 NCAA Wrestling Championship win.
The WrestleMania 35 replay will air on ESPN at 3pm ET. The marathon of UFC and NCAA matches will air on ESPN2 from 6am until 11am ET.
ESPN's 2009 "E:60" special on The Beast will also re-air during SportsCenter on Sunday morning.
Below is WWE's announcement on ESPN's Lesnar marathon with full details:
ESPN to air WrestleMania 35 encore & Brock Lesnar marathon this Sunday leading into WrestleMania 36 on WWE Network
The Beast Incarnate is taking over the Worldwide Leader.
ESPN will air the first nationally televised encore presentation of WrestleMania 35 this Sunday, April 5, at 3 p.m. ET. Sunday's programming lineup will also include several of Brock Lesnar's high-profile UFC title bouts and will culminate with his 2000 NCAA Wrestling Championship victory on ESPN2. All telecasts will stream via the ESPN App.
In conjunction with the WrestleMania encore, ESPN2 will televise a five-hour Lesnar marathon on Sunday from 6 a.m. to 11 a.m. ET. The full schedule is below:
* 6 a.m. — UFC Main Event: Brock Lesnar vs. Alistair Overeem
* 7 a.m. — UFC Main Event: Brock Lesnar vs. Shane Carwin
* 7:30 a.m. — UFC Main Event: Brock Lesnar vs. Cain Velasquez
* 8 a.m. — UFC Unleashed: Brock Lesnar vs. Randy Couture
* 9 a.m. — 2000 NCAA Wrestling Championship
In addition, ESPN+ has added a Brock Lesnar collection to its library that includes several of his classic UFC bouts.
ESPN's "E:60" feature on Brock Lesnar from 2009 will also re-air as part of Sunday morning's "SportsCenter."
Entering as the Universal Champion, Brock Lesnar battled Seth Rollins at WrestleMania 35. The event also featured the first WrestleMania women's main event as "The Baddest Woman on the Planet" Ronda Rousey took on Raw Women's Champion Becky Lynch and SmackDown Women's Champion Charlotte Flair in a "Winner Takes All" triple threat match.
WWE legend Triple H is also slated to appear on ESPN Radio's "Golic & Wingo" show at 9:30 a.m. ET on Friday, April 3 to preview WrestleMania 36.
The encore presentation will air in advance of the second night of this year's WrestleMania, which for the first time ever, is being held as a two-night event streaming on Saturday, April 4 and Sunday, April 5 at 7 p.m. ET on WWE Network. WrestleMania will be hosted by three-time Super Bowl Champion Rob Gronkowski.