Replying to 2015 camera releases/ predictions

Hey ns

I was looking around the web and was trying to see if there are going to be any big announcements for new camera bodies for both video and photo in the next year or so. I can't find any good rumors or new announcements. I am wondering if canon will release a 5d mkiv with 4k. Another question: would it be worth it to buy if it has 4k? Any other 2015 predictions?

I tried using the search bar and canon rumors, couldn't find anything. what about other companies?

Thanks

Marcus