Would Quick Silver fit in in x3?
I dont know, I never really liked the characters powers. I mean he is just fast....It doesnt really impress me much. I dont think he would fit in. How could he just show up and be like "oh yeah my magneto im your son!" But if he does show up who would play him. I think the guy that plays Spike in Buffy the Vampire series should play him. He looks like the evoloution Spike. But thats just my opinion what do you think?
About adamantium... ripped out by magneto, but apocalypse took adamantium from sabretooth (who had gotten it from his human son Craydon Creed, he later got adamantium from the new weapon x program) and placed on wolvie after wolfie defeated sabretooth in a fight to be apocalypses new horseman. Wolvie knew he would have a larger chance in fighting apocalypses brainwashing (sabret. wouldnt even try) and beat adamantium-sabret. even though he himself had no adamantium.
About Quicksilver, they cant have him without Scarlet witch.
I think it´s bad that they became heroes, scarlet witch is cool and would be cooler as a villian (witch she is in ultimate and evolution).
I think there was supposted to be a line in the first movie, the scene where magneto talks to rogue in the boat. "I have a daughter in your age" and he would sacrifice her to if necassery, I think. But it was never filmed or maybe it was cut out (and is not in X-men 1,5). It would have been cool, I mean introduction to scarlet witch, maybe she would be in a later movie.
He is on good. He really hates Mags guts for all the things hes done. Even Magneto's Acolyte, Exodus hates Quicksilver. Exodus almost killed Quicksilver's daughter including quicksilver. Quicksilver was in the avengers so he is a good guy, but was originally in the Brotherhood of Mutants. So i think he will be bad, then he will be good.