3) Emma Frost
January Jones came under fire for her performance in X-Men: First Class, something which is arguably quite unfair for the most part. The movie did a good job of portraying her powers and the Mad Men star was certainly sexy enough for the Hellfire Club’s White Queen, but regardless of whether or not Fox end up recasting the role, this is a character who should definitely be brought back in some form.
Hopefully she’ll use an English accent this time, while having her join the X-Men as she did in the comics would also shake up these movies in a major way. Of course, as it’s thought that she’s dead, that complicates things somewhat, but there are definitely certain ways around that. With it sounding like the Hellfire TV series is actually going to be set in the 1960, common sense says that Frost will show up there in some form.