some have speculated that the next algorithm on the x10 will be nist5
I think it's all just a dream now of actually getting the 2 new algos. Apparently, they have plenty of time to develop 2 new miners, with total of 7 different algos between the Giant B and Giant N. But have no time to release 2 new algos for the Giant X10.
One route makes them money, other route doesn't.