Is this dlc going to be high lvl 50+?? The 1 gripe I have is once you reach level 40, the game gets pretty easy .

I hope so dawnguard was too easy.

I highly doubt that. many people never even reach level 50. It would piss off a lot of players if they bought it, and couldn't play until they gained another 20 to 30 levels. If there is a level requirement it will be more like 15 or 20.

not really how skyrim works
when things level with you in a general sense, its pretty much impossible to make a real challenge after level 50ish
its just not how the game is set up to be

This. I'm guessing enemies start at anywhere from 10 to 20, but with the ability to go there whenever. Similar to Dawnguard.

Falmer Warmongers top at lvl64. Brairhearts somewhere around 60-62.

Yeah need more tougher enemies.

There are rumors about a high level quest floating around. No details on it and nothing to support it but an article found via a Google search.