There's a lot of controversy over this, but I don't think Jagex will do anything to be quite honest. Yes, they could remove EOC completely, but the whole reason they did this was to move forward. It was a marketing stunt to appeal to the newer generation of gamers. Besides, they spent hundreds of hours and thousands of dollars to make this update possible, It's hard to believe they would go back. On the other hand, they said the wilderness would never come back either, and look at it now.
When it comes to importing old servers, I HIGHLY doubt they will do this. They have already stated in a Q&A session that it's literally impossible. I'm not sure how, of course, but this is going by what they have said.
For one, I'd like to see new servers with the old game, but if something is to happen, I think a complete removal of EOC is more probable.