IMO, the ARF datejust 41 will 99.9% likely come with an ETA (clone) movement
IMO, there is no particular incentive for ARF to clone a 3235 now; and there is absolutely no logical reason for ARF to use the 3135 clone movement in the datejust 41:
1. the gen (datejust 41) uses 3235 movement and not a 3135
2. the ETA movement's hands rotate anticlockwise when the crown is rotated clockwise. This feature is exactly the same as the 3235 movement
3. by now, ARF has been releasing various reps with 2824-2 (i.e. milgauss, yachtmaster rose gold two-tone, 116610 sub, and 126600 sea dweller) so they are comfortable in manufacturing reps with the 2824-2 movement
4. using the ARF milguass as an example, the 2824-2 variant is much cheaper than their 3132 variant (the 3132 is analogous to the 3135). ARF can be saving cost and build a more-accurate and reliable datejust 41, using an ETA movement instead of the 3135.
Therefore, i am pretty certain that ARF will definitely not use the SH 3135 movement in their upcoming datejust 41.
But of course... ARF can decide to go off the tangent and surprise us with a 3235 clone movement. But last time REF did that, the results were bad.