Ugh, I hope not. I think the WWW could be the “hero” in that she saves Rumple since we know she winds up controlling him, but to have him lose his memories? They already did that with Belle, and then with Emma and Henry, and now with all of SB again and Henry……it’s just too redundant, I wouldn’t find that interesting at all.
I think if it’s the WWW then it would affect Rumple’s mindset by making him feel like he owed her or something. If it’s someone other than the WWW then it must be someone he wouldn’t have expected – i.e. Hook or something, and that would make him question things and change his mindset.