I know people think so, but i don’t. In the end, i see Rumpel as the big bad of the series because he is the instigator, but we will see. I actually think it is more likely that Regina will be redeemed, but maybe they will do it for both characters by series end.
I just think there are three sides to this war game, Regina, Rumpel, and then the family, Emma, Snow, Charming, Henry, and their allies. I think that those three sides are the sides and that Regina and Rumpel have their own purposes and are not going to join with any one of the sides except when it serves their purposes.