According to Lambgoat, Suicide Silence may have found a new vocalist. Who is he? Eddie Hermida of All Shall Perish, whom you might recall performed "Slaves To Substance" with the band at Mitch Lucker's memorial show in December 2012.
I originally thought SS was done and any form the band would take should be under a new name, but now I think it would be good to keep the name. It'll keep Mitch's legacy alive better, as well as allow them to build upon everything the band has done and accomplished. It's going to be damn near impossible to replace Mitch's unique vocals though.
They don't really have to change the name, but I would at least recommend going the Sublime route and do "Suicide Silence with Eddie Hermida"... I don't know. If they do have a softer, more metalcore sound on the new songs then I'll definitely be giving the band another listen though.