I may have miss read something but here is a little worrying possibilty
I take it by now you have read the news 'Early 2004 sets'
That news had all of the early 2004 sets.
Some of the listed were;
Toa Valkama, Toa Wenua, Toa Nakama, etc
So if all of the Turaga are becoming toa again, that means there would be 13 toa/toa nuva.
Thats alot and too many to present any challenge.
So if the Turaga become Toa again would our beloved Toa Nuva become Turaga Nuva?
and the Turaga take over in their toa forms?
Note: Think about MoL Bionicle keep telling us that Takanuva fighting Makuta is his'Final Battle' and 'his Destiny'