I'll be extremely disappointed if Marvel doesn't modernize Eric's origin to something that is important now.
One of the reasons Eric is the most important X-Men villain it's because he's a walking example of what hate and prejudice does. Eric is a character with a message. He makes (and should make) people feel unconfortable now.
The holocaust was awful, yes. People still feel awful when it's brought up, yes. But it happened decades and decades ago and there are many other important issue that should be brought up.
Damon Lindelof said about adapting Watchmen to HBO that there is no point in adapting that storyline making allegories to Reagan or Gorbachev, or the Cold War. It would be a disservice. And I think adapting Eric, ignoring social and political issues now would be a huge disservice for the character.
And if that wasn't enough, Marvel has another reason to modernize him. If Homecoming is any indication, Marvel will want to stay away from what's been adapted before. And boy, we've seen Eric's origin ad nauseam.