Where will Onyxia merge at the end?

After Onyxia server finishes with wotlk ICC raid, will it merge with Icecrown or Lordaeron? Or what will happen with our characters.
An answer would be appreciated.

I guess Icecrown will be the destination realm to transfer our characters after all 3 expansions will end.

You'll need to manually start the transfer progress after Onyxia ends. Target realm is going to be Icecrown. Lordaeron isn't an option as it has no point or coin shops, nor higher rates. All which Onyxia will have.

i think it'd be another independent server just like icecrown with *3 rates