There are several sites showing "spoilers" about Ben and Clyde and the new flashbacks of Will's death. Ben supposedly shows up at the church, somehow reveals Will is alive. After the reveal, Chad & Abby wed, but Sonny & Paul do not. Marlena hypnotizes Ben to get info on Will and he mentions Memphis.
This is where the storyline will take several Salemites in search of Will, including Sami. Kate also visits Clyde in jail to also get info, but doesn't mention what he tells her. Nothing has been said about when we'll see those flashbacks. Chandler Massey (Will) said in an interview that the discovery of Will being alive is shocking, but there is a "medical" explanation. This may mean Dr Rolf is involved somehow, but that is just speculation on my part.