I'm pretty confident that Quicksilver & Scarlet Witch will be referred to as such in the film. With every other hero having been officially been named, it'd be weird not to do the same with them.
t: He looked like he was teleporting. Whedon's Pietro seems slower compared to Singer's judging from the Cap 2 mid credits scene. At least they have a different effect when speeding. Whedon's leaves a trail and Singer's is basically teleporting, he's that fast.
t:
They pretty much got around the codename thing plausibly for the most part. Iron Man is the name of the armors, Black Widow is Natasha's spy handle, and "The Hawk" is maybe a nickname for Clint. Someone will refer to Wanda as a witch obviously, don't know how QS will get his.
I don't think that Aaron Johnson can act more cool and smug than Evan Peters QS.
Though, it can happen as Whedon is capable of doing that.
Whedon is used to writing a *****e. He's had practice with Spike. He just needs to use that personality at the very least, and then can add to it.
I agree with those that have faith in Joss.
For me, I enjoyed DoFP, and yes I enjoyed EP's Quicksilver more than I thought I would. Still really don't care for the look of him though, and I personally don't agree with those that say his one main scene stole the entire movie. It was a fun scene, sure, but after viewing the whole movie, I'd say that McAvoy's performance in general was the movie stealer for me. I agree with those that say EP's QS seemed too overpowered. And with how little he was in DoFP - for me the QS bar wasn't really raised all that high.
Naturally final judgement is reserved until AoU actually comes out, but I have faith in Joss and I don't think it'll be hard for him to maintain his own vision of the character, I think he'll make it work, that he and ATJ will make QS their own, and I think they'll have a hard time jumping over that QS bar.
Just my personal opinion thought (apologies if it didn't make sense)
I think DOFP QS is way faster than his comic book counterpart; that prison break scene where he was able to do so many things before the bullets reached the other X-Men would've meant that he will be too fast for even the naked eyes to see.
Quicksilver's as fast as the speed of sound right?
I don't think that Aaron Johnson can act more cool and smug than Evan Peters QS.
Though, it can happen as Whedon is capable of doing that.