SS once blasted Thanos point blank on the face and seemed reasonably angry at him. He just took it and asked him if he was done. I don't think he'll be needing that shield that much. I doubt transmutation or siphoning powers would work either since Thanos has those things and defenses against them. The only real advantage he has is speed.However, current upgraded Silver Surfer should be able to beat him. I saw some previews, and it looks like he's being set-up to match Aegis or something. Complete with the will, he should probably have the overall advantage in paper.
thor beat ss easy
Didnt Thanos had position over some of the sould gem on that fight when SS blasted him in the face and was unfaced. I do agree that Thanos is just too overwhelming a foe for SS to faced.
Current bloodlusted SS = Thanos or SS maybe even rivals him, but we still havent seen any new feat for this current herald.
I've reread the Thor madness crossover specially the match between SS and madness Thor. Thor beat the crap of SS on that fight and then Warlock came in to help. Question dough: Why was Warlock surprised that SS was not injured at all when Thor beat the crap out of him? I mean Warlock would not have mention it, if SS was in actually danger. My opinion, SS was jobbing on that fight, I mean he was not able to apprehend Thor but he does not want to cause him injury unlike Thanos. He did desame thing to SS anihillation #2 when he actually found out the weakness of the seekers but he was unable to act it cause of fearing there death and then the seekers was about to jump and capture him when he was save by the other heralds. just my 2cents.