i dont think so, it is a new platform that have everything what t129 has. so why needed a new platform? because licence agreement between italy and turkey addresses italy as a source of transmission and other rotor parts(may be some others) . there are some restrictions to install new equipment on ATAK because of its small air frame.
so problem would be solved with this new heli.
If this was the case the orders for further T-129 would have stopped, to my knowledge deliveries are still on going. Another 24 T-129B2 will be delivered over the next 2 years with further orders likely (Option package). T-129 will probably reach around 90-100 Helicopters in the Fleet (Army,Jandarma, Police) atm we have 57(+1 crashed in Syria through engine failure), which means around until those orders are fullfilled ATAK-2 will be close. Until you make that switch on the production line from T-129 to T-629 months if not even years will pass, combined with testing, weapons testing, TSK testing. Let us also not forget TS-1400 is not even ready yet for production, not a single flight test was done.
There is no reason to dilute our fleet with three different Helicopters, the T-629 has no purpose for the Army, T-129 is excellent at COIN which was the reason it was choosen in the first place, ATAK-2 will be primarly focused on Anti-Armor duties. So what will the T-629 do? Other than be a waste of money, don't forget this a TAI project not an Government issued one, there is no contract like there was one for T-129 and Heavy Attack Helicopter.
And Akar's reaction tells me enough, he wasn't even aware that the T-629 existed when he first saw it(you can pretty much understand it from his words).
Nor was the T-629 ever mentioned by Government officials, why not? Because they don't want it. Because they don't need it. Because they know until the T-629 becomes even serial production ready to make a impact for the TSK, ATAK 2 will be around the corner. Why waste resources on an Helicopter that in 12-24 months will have no real purpose and will become obsolete.
That is my opionion on the matter, until I see a Government official utter the words T-629 and TSK from their mouths together in a sentence I'm going to stand by my position.