You would think they'd do it that way but they never actually have. The closest they came is where they did the MMS117 clean T2 and then came out with MMS136 T1 which is a slightly younger version of the MMS117 sculpt with a different hairstyle.
But the next T2 Arnie they made was DX10 where they created an entirely different sculpt. The DX13
prototype somewhat seemed like it was based on the DX10 sculpt only for the final figure to have, again, entirely new sculpts.
So I wouldn't be surprised if any new Clean T2 changes the sculpt from DX46 - which it should. They gave DX46 a fat-head again.